Hiking in Hawaii has really picked up in popularity over the past several years, and this was especially evident on our hike to Hanakapi'ai beach a few weeks ago. Though I am usually hesitant to share such beautiful spots with the internet, there are already so many people doing this hike that I figure I might as well put in my two cents.
First, be prepared. This hike does not offer a lot of shade so make sure you bring a hat, sunglasses, sunscreen, etc. depending on your preferences. Because it gets hot quickly, make sure you pack enough water. For the 4 miles roundtrip I had a little less than 2L of water. This was barely enough for me...I was fine but definitely could have used more water. Also make sure you have appropriate footwear. I saw a number of locals going through the trail barefoot, but if you are unfamiliar with the trail you should definitely wear covered shoes as there are rocks and varied terrain. Also make sure you bring in snacks or a lunch to have at the beach since its a great place to stop and take it all in. Also, be prepared schedule-wise...other Yelpers are correct in stating that the parking lot gets crowded the later you go in the day. We got there around 9am on a Saturday and grabbed one of the last spots in the overflow parking lot. Another bonus of hiking earlier is that the sun will be less intense (trust me...hiking out around noon from the beach was hot and miserable...avoid that time of day if possible!).
Second, PLEASE remember to be courteous to other hikers. The trail to the beach, as it is also the start of the Kalalau trail, is heavily trafficked. That said, there are people of all different fitness levels and hiking experience on the trail. There were a number of times that my group was taking it easy and all of a sudden we were being tailgated by a large group of tourists which was very rude and irritating. If you want to pass, just say so! On the contrary, there were others that would pass our group by saying something simple like "excuse me" or "on your left"...this was much more pleasant than just having someone on your back for a few minutes that clearly wants to get around you.
Third, think twice before taking your kids on this hike. I saw several families with kids of varying ages and made a mental note to myself never to bring my future young children on this hike. There was one family with two children, a young daughter (maybe 4-5 years old) and an elementary school age son. The daughter kept falling behind and had to be carried a lot of the way, while the son would just dash ahead so often that he was alone a lot of the time. I saw another family with a baby in a carrier, and in the hot day their entire family seemed miserable. If you're only going to the first lookout on the trail, that might be ok for children...but going all the way down to the beach is a different story. I would personally not bring kids younger than middle school age, as the trail is long and does get very hot in the middle of the day.
Fourth, respect the land and be safe. Take care of everyone in your group and make sure you keep eyes on everyone whether you are at the front or back of the pack. Many people bring snacks, lunch, and plastic water bottles on the hike. There are no trashcans along the trail, so remember to pack out whatever you bring in to keep the area pristine and beautiful. Stay on the marked trail as well, since going off-trail will cause erosion and harm to both the trail and the plants.
All in all, this was a great hike with some awesome views and a really rewarding beach at the end of your 2 miles in (if you choose to end at Hanakapi'ai beach). Just be prepared and be wary that the trail will be crowded with a lot of visitors.
TL;DR - plan ahead, bring an appropriate amount of water, and be respectful! read more