I am travelling to Phoenix from Virginia in late July for a conference. I plan to rent a hybrid and take some rides in the evening, and possibly stay a few extra days and do some camping/hiking/biking in the Tonto National Forest area. I have only driven through Arizona so am excited by the opportunity to get outside and explore but am afraid the July heat may be prohibitive.

Is it foolish for a reasonably healthy 42 yo to try to ride in Phoenix in July in the evening? Any suggestions for cool places in Tonto (or anywhere within a couple of hours drive) for camping, hiking and maybe some intermediate trail biking?