Rosie, Dakota, and I LOVE Chaparral Dog Park!!! It's very convenient and surrounded by a lot of paths, a desert xeriscape, baseball fields, ballparks, and a lake with ducks.
The Scottsdale Park and Rec Dept. does a wonderful job of keeping the park clean and shaded. You can find trash cans and poopy-pick up mitts located all over the park and paths.
The fenced in area is huge to let the dogs run, play, and sniff!