Bike Trails/Paths In Northern Phoenix?

[+Mitragorz]

I'm a pilot,  just bought a Montague Paratrooper folding mountain bike that I can take on the road with me.  

 

We're bringing some clients into Phoenix this weekend for the big game.  We'll be staying up near Deer Valley Airport.  Are there any cache-filled, bike-friendly paths or trails up that way, or even further north of the city that are recommended?  Not necessarily power trail type trails, just a couple good routes with a decent amount of caches.  Also not looking for anything too strenuous, but a mild workout is fine.  I'm a flat-lander.  We'll have a car, so hauling the bike around isn't an issue.  I'll just have the other pilot drop me off somewhere and leave me to my own devices for the day.