Hey there,
If you take the Fruita exit.
Go north across I70 and continue through the stop sign to Ottley
(to get to old town Fruita turn R at stop sign)
Right on Ottley to 18 1/2 rd
Left on 18 1/2 rd and stay on it all the way to your destination (8 miles?)
18 1/2 eventually turns to 18rd and switches to dirt
Parking lot/trailhead on left, campground a bit further north
Check out
www.gjmountainbiking.com for trail maps & descriptions
Josh