is a good one, and you can continue up to the summit if you want. Massacre Falls in the Superstitions probably has good wildflowers right now, but no water unless it's raining or did a lot last night. 

East side of Hawes Trail System has the Alp 'd Huez-Iron Goat Trail Loop that is excellent. On the west side, Upper ridge, ridge, and saguaro are great. Hard to go wrong almost anywhere you go up at Hawes. 

Tom's Thumb north of Scottsdale is good. 

There's a ton of options, and they're all good. But Camelback and Piestewa are classics if you don't mind people, especially if you can be up there in the evening as the light starts to fade.