Are you looking for a swim? Lemmon Pools, Romero Pools, Hutch's Pool, Tanque Verde Falls, Seven Falls, Sabino Canyon. All of these subject to drying up during drought--some more than others. Ask locally (I no longer live in Tucson). Go to Summit Hut, get maps, ask around for latest swim info. Some pools will fill up again if monsoon is pretty good, so if they are dry now they might be good again in late August.
Lemmon Pools is the one that's pretty hard to get to. The rest are straightforward hikes on trails. Well, not lower Sabino. That's on a road with a shuttle bus--you can walk or take the shuttle. I'd bet money it's pretty dried up right now, though. Probably someone else will add comments to that!