Pumphouse Wash Hot
From the Sedona area, take HWY 89A towards Flagstaff and up the Oak Creek Canyon. 14 miles from Sedona is the downstream entrance to Pumphouse wash (near milepost 387, just before the bridge). If you continue up HWY 89A to milepost 391.5, you can turn right onto FR237 and drive 1.5 miles to the upstream entrance to Pumphouse wash.
boulder hopping and swimming through a Sedona canyon
This is a good canyon hike in the summer months. Don't be frustrated on the slow progress due to the boulders and route finding, enjoy it. There's occasional pools to cool off in or scramble around. You can go as far as you want and turn around, or you can find a buddy to shuttle you from one end to the other after your hike.
In some parts of this canyon, the walls surrounding you are 1000 feet high. Scrambling around and over boulders is fun!