I'm really surprised I haven't reviewed this place - though I think I at least have reviewed the…read moreTree Top Trekking.
The one thing I don't like is the notion of having to pay to enter a park. This might sound like an odd take since it's quite normal in Ontario, but being from BC originally, I can tell you that it was quite surprising (for here, and all other paid conservation parks). It's frustrating that the nicest park in the city - by far, which also has it's only natural lake, is gated and requires an entrance fee.
I'll still give it 5 stars since it's part of a norm for the entire province, so I can't really hold that against it. I'll also have to admit that having a fee has perks which become apparent - namely: much cleaner, high staffing ratio (which helps cleanliness), no overcrowding, well maintained and even the configuration. It's similar to hating the cost of the 407 but having to admit you also love being able to cross the GTA in half the time.
Heart Lake itself is a nice lake, and as mentioned the only natural lake in Brampton and probably one of the largest for quite some distance around it. Even without having visited, you may have seen it without realizing it since it was used in the movie Tommy Boy years ago (when Chris Farley is sailing and being taunted by kids). There is fishing, various types of boating, which now also includes boating at night with clear boasts that have bright neon lights around them.
There are trails to walk along it too, but sadly not to go around it since city planners in their infinite wisdom years ago allowed a handful of houses to back onto the lake. There's also a some cross country trails in the wooded area for that type of running and cycling.
The treetop trekking here is fantastic, but a completely different fee and business listing. But worth noting it is located here.
There's an insane amount of picnicking spots. A perk with it being paid entry is that you're very likely to find a table and they even offer spots for charcoal disposal. They do offer being able rent out large spots for very big gatherings as well.
They have a big splash pad and a nice large outdoor pool which has proper rope separation between shallow and deep ends. Again, the pool is quite large, so even on a busy hot Saturday in July, there was reasonable room in the shallow end - but considerably more space in the deep end. There is another fee for swimming, but it's quite reasonable. Good lifeguard ratio as well.
So you've got to 'pay to play', but I also can't say there isn't value for the money. I'd highly recommend looking at an annual pass (family pass especially) which probably pays for itself within 2-3 visits here, or to any of the other TRCA conservation areas. I believe Brampton library does offer the ability to borrow a pass, but you'd want to plan ahead as I wouldn't be surprised there's holds for it.