Your best bet would probably be the Gulches (Hackett Gulch, specifically) or even China Wall. Both are pretty easy going. There is one "tough" spot in Hackett Gulch, if you want to call it that. It's a big flat rock with some inclination. Just keep on the throttle and it's a cinch. It ends at a river where you can eat lunch and screw around a bit. Hackett Gulch: TrailDamage.com - Hackett Gulch
China Wall: TrailDamage.com - China Wall
. Rule Ridge is a super easy trail, rated a 2-5. I haven't been on it, but it is in the area. TrailDamage.com - Rule Ridge
Hope this helps!