I picked this place for us to try for lunch, as it was our first time. I like seafood but my wife does not so I had hoped for something for both of us. I love that Rio has some great new places and this is one of them. As soon as we entered we were greeted by Ms Sandra with a cool vibe about her. She's funny yet Direct when she needs to be. We had a few people in front of us before we ordered so we were able to hear a little bit of the options available. We were also told about the options once we got up to the front counter. Miss Sandra was working the front counter when it was busy, greeting guests, also clearing tables and bringing the food to the guests. She has a great demeanor and witty Banner which we appreciated :) i ordered the Connecticut roll and lobster bisque. My lobster roll was hot and fresh and the lobster bisque had a good amount of lobster in the bottom of the cup. My wife ordered a grilled cheese and tater tots as well as a whoopie pie and to wash it all down a blueberry soda. The inside was nice and clean not too crowded and everyone loved miss Sandra's service. They also had someone making the food behind the counter. All in all this was a five out of five for us experience wise. Would definitely visit again - SupaFlyITGuy approved! read more

See all

My husband and I were so excited to try Mason's Lobster Roll in the Rio shopping location in Gaithersburg. So yesterday (7/24/26 @ 7:52 pm) was our first visit. Unfortunately, we had the most unpleasant and terrible experience with this male server. We've lived in Gaithersburg and have been shopping there for almost 20 yrs. I've never experienced such foul and disrespectful customer service until yesterday. This server was rude, sarcastic and disrespectful! To the owner, would you want this person representing your business? Customer service training in the restaurant business can only take a person so far but foul attitude is a dead end, it's bad news! This person's attitude was unacceptable! Normally I let it go maybe this person might be having a bad day or going through some stuff in his life. Not this guy! It seems he purposedly pushed me to the edge. I am sharing this experience to everyone hoping you'll be aware of this person's terrible attitude. Unfortunately he didn't give me his name when I asked. Otherwise the food was good and flavorful. read more

My husband and I were so excited to try your new restaurant -Mason's Lobster roll @ Rio in Gaithersburg. So yesterday (7/24/26 @ 7:52 pm) was our first visit. Unfortunately, we had the most unpleasant and terrible experience with this male server. We've lived in Gaithersburg and have been shopping there for almost 20 yrs. I've never experienced such foul and disrespectful customer service until yesterday. This guy was rude, sarcastic and disrespectful! To the owner, would you want this rude person representing your business? Customer service training in the restaurant business can only take a person so far but foul attitude is a dead end, it's bad news! This person's attitude was unacceptable! Normally I let it go as this person might be having a bad day or going through some stuff in his life. Not this guy! It seems he purposedly pushed me to the edge. I am sharing this experience to everyone hoping you'll be aware of this person's rude attitude and hopeful have a better experience than us. read more

The food was too expensive for just one piece of bread with frozen lobster ‍ and they were very pushy about their tip

Consistently consistent. Love the lobster rolls at Mason's Famous. Stuffed with tasty crab on a fresh bun with several styles to choose from. I'd eat here every week if my budget and cholesterol could handle it. Great service and a clean restaurant. Friendly owner and staff tops off a great reason to give them a try. read more

See all

When you are in the mood for something pink and tasty, come to Mason's! Service is amazing, warm, and genuine. Ambiance is good. Rolls are filled to the brim with ______. A bit too much mayonnaise for my taste, but otherwise delicious! But mostly, come here for the rolls! Try the MD crab soup! It's also really good and not too salty. Nom Nom Nom! read more

See all

Pretty tasty Connecticut Lobster roll. It's $23, about the same price as Panera Bread but a lot better. My lobster roll had plenty of lobster meat with lots of butter on a warm buttery roll. Been to their Rehoboth Beach location couple of times. Glad it opened in Gaithersburg. I would take a pass on the tater tots as they were soggy. read more

See all

2.5 After seeing a movie, I was in the mood for lobsta! For a Saturday afternoon, i had expected the restaurant to be busy! No ... just two people at a table red flag! I go to the register... no one is there... So I wait... nothing.. I shake my keys... even fake cough to get someone to come out.... nope.. I know the employee hears me cuz they are in the back... I finally yell I out a HELLO!!! Finally, a woman appears.. i said oh I thought you were closing lol. She didn't apologize or anything. I got the Connecticut Roll . $21 You get nothing besides a wilted pickle... Let me tell you, I've been to Boston and I had the real deal. This mess is not happening.. not worth it! My bread was barely toasted! It could have got soggy of i didn't eat it promptly. Yes it's bland!! It lacks flavor. Lobster doesn't taste fresh.. Luke's Lobster is better. In Annapolis they have better options. After reading the reviews, i don't see this place lasting long. DONT get the soup. read more

See all

Came here after seeing a movie and we were so excited to finally try this location since it's close by to us. We were greeted by a nice lady at the register so that was a great way to start the experience. The ambiance was your typical fast casual town center vibe. We ordered the Bar Harbor lobster roll, Maryland crab vegetable soup & the New England clam chowder. The lobster roll was decent. I'd give it a 7/10. Comparing it to the Reston location, this one lacked flavor, even with the butter. They give you the choice between chilled or warm and we chose warm. Both soups were okay. I'd give them both a 6/10. It was more watery than I'm use to but the taste wasn't bad. I probably wouldn't order it again though. All in all, the food was okay. They're still pretty new so hopefully they'll get better in time. read more

See all

Truthfully, I would say 3 1/2 stars....The service was awesome! The woman who waited on us couldn't have been nicer. She was wonderful. The restaurant still has that just opened feel. Everything is neat and clean. The restaurant is well organized and it didn't take long to get our food. The lobster meat was just okay. I ordered the lobster sandwich meal with the larger piece of the lobster meat. The portion size was great. The taste was lacking, even with melted butter on it. I also ordered the tater tots. Here is where I am a little bit picky. I like my tater tots hot and crispy. These were neither. They were warm and on the softer side. They tasted okay, but not hot and crunchy tots. So, while there was nothing wrong with our meals, if you are paying $30 for a sandwich and sides, you want it to be outstanding and memorable. My friend, Yelper, Carroll and I, both agreed that it was a meal that lacked luster and flavor. I would like to return and try the salads or soups. read more

See all

10.18.24 Scratching my head trying to figure out who decided that they were famous. Lol. I ordered the Connecticut Roll combo and fellow Elite Yelper Joy B. accompanied me on this visit and got herself the Bar Harbor combo. Sadly, we weren't impressed by our rolls and have had far better. The lobster was supposed to be hot, but it wasn't. It was also bland and dry. Although it was served with butter, it likely would have tasted better served with a sauce and seasoning such as Old Bay to make it less dry and to enhance the flavor. The best part of my sammie was the roll. It was buttery and yummy. Tater tots were decent, but could have been crispier. Although the food is mediocre to me, I will give a shout out to the staff who took our order. She was friendly and helpful in explaining to us about the menu after we informed her it was our first visit. During our meal, she also asked how everything was. Lastly, we were going to throw our trash away and she said she would take care of it. Top-notch service. They have limited seating and it was a bit chilly as they kept the door opened. They put some tables outside. They offer takeout, delivery, and catering. They are located close to the movie theater across from the Courtyard Marriott. read more

See all

Guess what I had for my birthday lunch? A traditional lobsta roll! I usually go for the warm Connecticut roll, but I was feeling the need for a change up. We came to Rio for the Taste of Rio event and I definitely wanted a lobster roll. However, their booth did not have electricity at the moment and long story short, we went and dined in at their storefront location. I've been to Mason's Virginia Beach location and loved my experience. I was excited to read about this location opening. It took me awhile, but I'm here! It was very good. Perfect amount of lobster meat. For $21 they are cheaper than the food truck competition that makes it way all over town. It's my birthday, so I deserve to treat myself, right? read more

Mason’s Famous Lobster Rolls - Half of my traditional roll - Seafood Near Me - Gaithersburg, Maryland

I've had lobster rolls in California, in Maine, and several places in between. These were INCREDIBLE! Some of the most meaty, tasty, delicious lobster rolls ever! Not to mention the couple that own the place were super friendly and so were their staff. We ordered the combo meal with the Connecticut Roll and a bowl of clam chowder. We decided to share, so we went for the "Bar Harbor" which has 50% more meat. We couldn't stop at one, we went for a second, this time we went for the classic with the Bar Harbor extra meat option. The lobster was fresh and piled high!! The portion sizes were super generous. I hope we have time to get back over there for lunch tomorrow before we leave. read more

Mason’s Famous Lobster Rolls - Bar Harbor lobster roll - so meaty and delicious. - Seafood Near Me - Gaithersburg, Maryland

See all

Visited Mason's for lunch. Ordered 2 Connecticut-style lobsta rolls, a tater tots, and a clam chowda. The lobsta rolls had nice big chunks of firm lobster meat. The tater tots were a bit on the soggy side and not my vibe. The clam chowda was good with nice chunks of clams, but more onion and watered down than I cared for. The cashier was super nice and saved me $1 since I was ordering a combo but wasn't paying attention that I was. They haven't been open for long but the place was clean, the service was quick and I even heard an employee (not owner or manager) thank people for coming in. What?! Thumbs up guys read more

See all

Tried Mason's in RIO for lunch today! The lobster roll, cold meat with a touch of mayo, and some clam chowder The lobster roll ($27) with extra tail meat was spectacular. Toasted and buttered bun with tons of lobster meat. The clam chowder was thick and delicious with just the right amount of clams, potato and onion in a creamy base. Must return! read more

Mason’s Famous Lobster Rolls - Mason's in RIO, Gaithersburg - Seafood Near Me - Gaithersburg, Maryland

See all

This location is right off the road with little parking for me to pick up my Togo order. I had to get valet to let me park next door and run up. The roll was good but the sides they didn't have and subbed fries for it. Wish website said they were out of the clam chowder because I think the fries were cheaper but I got no refund. read more

(4.25) ~ Very good Overall food & Service. Note: Free Parking garage in the same building. DRINKS: ** Blueberry Maine Soda = (4) very good ** Ginger Brew = (4) very spicy FOOD: ** "Cooper" Roll = (4.5) Very Tasty! And you can ONLY get it at this location b/c it's named after the husband/owner. It's Lump Crab meat + Lobster warmed w. melted butter. ** Classic Lobster Roll = (4.25) Very tasty...although the Lemon Wedge was missing... ** New England Clam Chowder = (4) very good ** Maryland Vegetable Crab Soup = (4) very good *** Whoopie Pie = Too many artificial ingredients...wish they offered one w. more natural ingredients... read more

Drove from West Virginia to Gaithersburg, Md. for a special lunch. The place had a sign that said "open", but it was not. There was a sign on the door that said "be back at 1:00, but it was not. Returned after 2:00, it was still not open. I'd been looking forward to lobster for so long. Next time we'll just drive to Maine! BAD BUSINESS read more

Delicious, fast, good quality,nice service Good location. Simple and tasty. Good location quality life read more

This place recently opened in Rio! They have a variety of rolls including the classic roll, Connecticut lobster salad roll, lobster BLT roll, shrimp roll, and crab roll. All rolls are $21, besides the $16 shrimp roll. They also offer lobster mac & cheese ($16) and lobster grilled cheese ($17). We ordered the Connecticut roll; there was an option to upgrade to The Bar Harbor, which adds 50% more lobster and tail for $27. We weren't blown away by the Connecticut roll and thought it needed more flavor. The place was clean, the employees were friendly and welcoming, and the service was quick, so we would be open to coming back in the future to try their other options. read more

See all

I came here for lunch on a Tuesday at 1 o'clock with my one year-old for a quick bite to eat there was one man in line ahead of me after 15 minutes of waiting the restaurant was unable to take his order. I asked if I could order and they ignored me so I left. My baby was getting fussy. read more

So tasty and clean in the restaurant. A perfect little stop while shopping at Rio. I'll definitely be back!

The food and service were wonderful!!!! I got here too early and I waited at one of their 3 outdoor tables. The owners walked out as I was waiting and both greeted me as did the interior staff when they opened. I got the Connecticut Roll and the bun was thick and buttery and warm but not too doughy and the lobster meat was warm and fresh. Jose even took the time to wrap and seal the pickle so the juice wouldn't run into the roll. Patricia also very warmly welcomed me to the restaurant and rang me up quickly. This place will def be a huge hit and it's so well deserved!!! read more

Mason’s Famous Lobster Rolls - Connecticut Roll - Seafood Near Me - Gaithersburg, Maryland

From the moment I stepped into Mason's Lobster in Gaithersburg, I could feel something different in the atmosphere; it wasn't just the warm lighting or the aroma of freshly prepared lobster; it was a sense of peace, of welcome, of something deeper. What I thought would be a quick bite turned into something far more special: a moment of connection, kindness, and fellowship. I ordered the warm Connecticut-style lobster roll, and let me just say; perfection. The lobster was tender, flavorful, and buttery, nestled in a roll that was perfectly toasted. It's comfort food elevated to something you genuinely savor. Every bite reminded me that good food has the power to nourish more than just the body; it can nourish the soul, too. But what truly set this place apart was the owners. I was greeted with warmth, sincere interest, and open hearts. They didn't just serve me food; they welcomed me like family. We talked, prayed, shared stories, and even broke bread together. It was the kind of encounter that reminds you that there are still places in this world where love and faith quietly meet hospitality. There's a grace in this place that can't be faked. It's in the way you're treated, the care in every detail, and the feeling that you're not just another transaction; you're seen. Thank you to the owners for embodying the kind of love that leaves a lasting impression. You've created more than just a restaurant; you've created a place where hearts are fed and Christ's love is quietly present in every warm welcome and plate served. I'll definitely be back..and not just for the lobster roll. read more

I was so excited to find out that Mason was coming to MoCounty... we finally went. I think we got one of everything on the menu. They were so friendly so helpful so accommodating. I like it even more knowing that it was black owned, gotta support our black businesses. Since this first visit I've been back three times..Don't judge the Bar Harbor is amazing. Go get yourself one. read more

Mason’s Famous Lobster Rolls - The Bar Harbor - Seafood Near Me - Gaithersburg, Maryland

Mason's at the Rio In Gaithersburg is excellent. Staff is very friendly and chef was helpful and cheerful. Really felt welcome eating there. Not all locations are hospitable. read more

November 19, 2025 To: Dan Beck - CEO of Mason's From: Bernadette Freeman (Customer) Subject: Terrible Customer Service (So disappointed) My son, granddaughter and I came to Mason's on Nov 15th, 2025 for the very first time yesterday to try the food. The WORST customer service ever. The lady with the short hair cut, was treating and talking down to people of color in the restaurant. It was not just us but the cashier as well, you could clearly see that the cashier was in training. The cashier is also a person of color, she was speaking and treating her as if she were stupid. She started hollering number 13, as she's hollering, she walking towards a couple who was sitting. I then started checking my receipts to see if there was a number because no one said listen for a number, again it is our first time in your restaurant, and we let them know that when we ordered. She proceeded to sit my soups (2) in front of this couple, I then walked over and said I am number 13, she turned and said I called number 13 and I then say, I didn't know there was a number system because no one told us that when we paid. My soups were exposed (no lids) to her and these customers. We spent $167 in this restaurant for lunch. I could have spent that shopping elsewhere to be treated like that with her attitude and rudeness. I ignored it. She was extremely rude and loud the worst customer service ever, so unprofessional and very embarrassing. Everyone in the restaurant turned and was looking and listening. No discretion at all. Very unprofessional. I will not dine there again and will spread the word of my experience to my colleagues, I work for Montgomery County with over 25,000 employees, and I will gladly send an email. I know this cannot be the first time someone has complained about that employee. We ordered different orders. My numbers were 13 and 14, one to dine in and one to go. We had my grandbaby with us, so my son went next door and brought her a kid's Chipotle because she will not eat seafood. When he returned our second order had come out and we had started to eat. Then she comes over again, Loud and Rude, with no discretion, the whole restaurant is looking at us again. She says she cannot eat other people's food in here. I said she is a child, she cannot eat outside by herself, and we spent a lot of money here. So now I am very embarrassed and feel like we are being thrown out of your establishment. So, we left without incident, because she was really rude and now I have had enough of her rudeness. Again, she was loud and very embarrassing, I have never felt so humiliated in my life. She kept going on, so I said Lady I am being as nice as possible, leave it alone, we are leaving. She needs to be re-trained in customer service. I should have given her the food back and asked for a refund. I'm paying $167 dollars to be treated like crap. It may not be a lot of money for some people, but it is a lot for me, that was a special treat, that I could have spent somewhere else. She ruined my day and made us feel less than a human. So disappointed, Bernadette Freeman read more

Today we placed a pick-up order from Mason's Famous Lobster Rolls in the Rio Center in Gaithersburg, MD. We had family visiting from New York and New England and we thought it would be a treat. When we returned home after picking up the order, we noticed a few things that weren't correct. First and foremost, the salad with lobster mean had absolutely no lobster meat on it. Secondly, the lobster bisque, which we added the $5.00 lobster chunks to because the photo on the website looked so enticing, turned out to include very little lobster - in fact they confirmed when we called that it only includes 1 ounce of lobster meat - for $5.00. It was a ridiculously small portion and looked nothing like the picture. Lastly, the classic lobster roll that we added pickle to came without the pickle. We called and they were apologetic but my wife had to turn around and drive back to the store to exchange the salad which they had mistakenly left the lobster off of. They prepared a whole new salad for her which was actually pretty loaded with lobster. They also provided a new soup - same amount of lobster meat and still looked anemic and certainly not worth the $5.00 upgrade. The bisque, however, was very tasty just a bit disappointing in the content of lobster meat. The basic soup, we were told, included NO lobster meat. The lobster rolls were full and well prepared with extremely tasty rolls and the preparation was good. Again, based upon our experience, I wouldn't opt for the upgrade on those either because it's not necessary for the extra meat. We also had the New England Clam chowder which was tasty, well made, and loaded with clams and other ingredients. And we tried the lobster mac and cheese which was also tasty, but overall a small portion and perhaps not worth the cost. Overall, with the exception of the mistake of leaving the lobster off of the salad and the pickle off of the sandwich, the food was good. My advice to anyone thinking of ordering from Mason's is to simply go with the standard orders and skip any add-ons as they are clearly not worth the additional cost and in some cases left off the order. I would also advise anyone doing a pick-up order to check each item carefully before leaving the store to make sure no mistakes have been made. And because of the mistakes (more than one on this order), I would NOT to a delivery order. Overall I have to give Mason's Famous Lobster Roll a passable score but in the experience of our guests who are quite familiar with lobster rolls and seafood, this was not top of the line. read more

I'm not a big fan of lobster rolls or how much they cost. I get it though, seafood and all that. I got the shrimp roll. It was alright. I like the fried type I've gotten before in other places, the best I've had was in Maine. This is a cool addition to Rio, though. read more

Very good lobster roll. Clam chowder was flavorful but was a little thin. Owner came out and asked me about my experience. Shared with him above. He checked in out and apologized for the soup. Very nice and appreciated him speaking with me. read more

What's not to like? Very friendly service & the lobster was killer!!! We got Connec. rolls (with extra meat) & they were to die for. Worth every penny! Color us hap hap happy! read more

Not great. Lobster rolls are not prepared authentic and the soup is probably Sysco. Wanted this to be good but it's not and prob a tad just a tad overpriced. If they alter the menu towards more authentic they might survive read more

The lobsters we ate wow and plenty of meat. The prices were reasonable. We definitely will go there again if we pass that area.

lobster rolls were very good with lots of flavor, warmth, and perfect amount of butter with the toast. workers were also excellent and very nice and helpful. would definitely recommend this place to others read more

I visited last night near closing and the counter worker was great, nice and prepared the order well as two other employees sat gossiping and looking on. As I was walking out, one of the old ladies yelled at me, " be careful walking on MY floors with THOSE heels"! I told her the shoes had a non slip grip and left. What a negative and totally unnecessary comment to give a customer who just paid $30 for a roll and soup. If this was a manager, you need to learn manners from your counter worker. Next time, just say thank you for your business. Learn not to comment on customer's attire, it's quite unprofessional and could provoke backlash. read more

First time finding this gem! Absolutely GREAT lobster rolls! We'll be back oftenI've had lobster from Nova Scotia to Boston, and these are superb! read more

Thoroughly enjoyed the classic roll and lobster bisque. Friendly service. Limited seating but situated near a lovely place to walk around once finished eating. Not a weekly visit for me as it is expensive but worth it and I will be back. Take a minute to join the loyalty program. read more

The customer service at this place was on point, amazing . I've always wanted to try this place. I finally tried a lobster roll however I was totally disappointed. The place is extremely pricey and the lobster was really overcooked and bland tasting. It had a chewy rubbery texture which made it impossible to digest. I have to find a better lobster place because this one is not worth the money and the quality of the food was terrible. Please do better with seasoning and steaming your lobsters throwing butter and lemon is not a good taste. Making a sauce probably would have been better and try not to overcook seafood . read more

If you are planning on having a nice, relaxing day at Rio, do NOT go to this establishment. My partner ordered something from here (lobster roll and a cup of soup cost $30 btw wth) and as I am not much of a seafood person I opted to go somewhere else and meet my partner once I had my food. While we were sitting and eating, a staff member introduced themself as the owner and proceeded to scold me for bringing "outside" food into their restaurant in the most passive aggressive and annoying way possible. They claimed that if I got sick I had grounds to sue them as if that is something that happens frequently and as if I could afford a lawyer to do so. Completely ruined our day as it was unnecessary and rude. Would NOT recommend. Go somewhere else and get better, cheaper food. zero stars if I could. read more

This business is first off Clean. The bathrooms make me feel at home. The customer service is extremely warm n caring. The food speaks for itself. Lobster Rolls , no fillers, just Lobster Would recommend to anyone n the Gaithersburg area, Rio Lakefront. Give Masons a shot My favorite Connecticut Roll, Bar Harbor Style read more