There are lots of places in the state trust land on the north side. Go north on 7th street, past Deer Valley, and look east into the desert. Or, explore w. of Cave Creek Road, around Jomax, north of the dam. I've seen a few spectacular jumps built there. Also, S. of Carefree Hwy, between I-17 and Lake Pleasant Road, there are "playgrounds" north of Pyramid Peak and the CAP. However, make sure you don't go alone out there. A young man died out there a couple weeks ago. Also, to ride there legally, you need a permit. I think it's $15 for individuals, $20 for family, per year. Look up Arizona State Land Trust Office online or in phone book and order yours. Sometimes they do check!