Places to swim:
Pools:
Seven Peaks Recreation Center Gold's Gym 24 Hour Fitness Richards PE Building - on BYU campus
Various apartment complexes It is generally expected that you either live at these complexes or at least know somebody who does that you go with. However, some pools are much more strict than others. Also, if the apartment complexes are BYU-approved you will generally be expected to wear modest suits (one-pieces or tankinis for girls, no speedos for guys), though presumably some are more strict about this than others.
University Villa Raintree Regency The Colony University Plaza Carriage Cove King Henry Crestwood Apartments - heated pool Branbury - pool is open year-round Alpine Village - heated pool a lot more...
Hot tubs:
Seven Peaks Gold's Gym 24 Hour Fitness various apartment complexes: Carriage Cove - hot tub is open year-round King Henry - hot tub with waterfall is open year-round Crestwood Apartments - hot tub is open year-round Branbury - has a hot tub and sauna, presumably open year-round
Natural Water Sources
Utah Lake - people often go boating here, including water skiing and wakeboarding but a lot of people tend to see it as too gross to just go there to swim. But you can, and the Provo River Trail leads right to the lake so you can bike there.
Provo River - it's fairly common to float down the Provo River on inner tubes or on rafts. Some people take air mattresses or whatever they can find. It can get intense in some areas and you should probably be with somebody who has done it before so you can get out at the right spots. There is a bridge that a lot of people just avoid by walking around it. There may be tube rental/shuttle companies available. The river is cold, even in the summer. Be prepared. I think there are also certain spots along the river that have rope swings people have added.
Deer Creek Reservoir - This is about 30 minutes north of Provo in Heber. Go through Provo Canyon and you will see it on the left. It is relatively cold but it's pretty clean and it's a nice area. There are fees. Sometimes people go swimming at night, though again it's really cold.
Mona Lake - This is about 30-40 minutes South of Provo in Mona. It's not actually called Mona Lake but that's how it is commonly known. It's a small lake in a nice setting and it has a couple of rope swings. It's also pretty warm, especially in the middle to late summer.
Hot springs:
Diamond Fork Hot Springs - in Spanish Fork, requires a hike of 45-an hour depending on how fast you go. There are also 2 sets of hot springs, the first set you will get to is a group of 2 pools that generally has a consistent temperature. If you go a little further on the trail you will come to a rocky area with running water - it is a prettier setting but the water is not as consistently warm. These hot springs smell like sulphur (rotten eggs) but you get used to it after a while. It is also not uncommon to see naked people up there.
Meadow Hot Springs - by Fillmore. It takes about 2 hours to drive there but it does not require much time to walk to them from where you can park. These ones are really nice, the water is clear and really deep and don't smell like sulphur. They are in the middle of a field though on private property.
Midway Hot Springs - there are 2 - one is the Crater which you have to make reservations and pay for. It is awesome though it is inside this giant tufa mound and it is really deep and clear. It is where a lot of people get scuba certified. There is another one that is kind of inside of a river. There is an area that is sandbagged off. This one is sometimes REALLY hot. Like, way too hot to stay in there for more than a couple of minutes. I've been there several times and one time I went and there was a group of highschoolers that were drinking, playing music really loudly and breaking bottles on the ground. Wear some kind of sandles, chacos or the like, if possible.
Other ones.. the muddy gross ones by that church on the other side of Utah Lake?
