Update, 11/12/08: This trail is now a complete loop trail approximalety 4 miles starting and ending at the same trailhead. A new loop trail starts near the end of the original loop and is marked with a rockcairn. This new trail has many bridges and ladders as well as rock shelves and shwoops through washes. There is an alternate route around each 'feature' in the trail for the less adventurous rider. alternate route loops back into the main Brent N Mikes trail.
The dirt access road on the southeast end of town to the is the entrance road to FMC park. Follow the dirt road across the Green River making your way south then east again past the red archery barn in Scotts Bottoms nature area. Head up the road east for about 2miles past the turn off to the shooting range to the trailhead on the left of the dirt road. This well defined ATV trail quickly turns into singletrack and meanders its way up the north side of the valley then across to the south side up and around the ridge. Next, the intermediate section of single track winds its way around several ridges to an overlook at which point you can turn around for an excellent out and back ride to your vehicle at the trailhead & back to town. Contact the Green River Chamber of Commerce for trail guide info or Greyhair Bike Repair at 307-875-1445
http://www.singletracks.com/item.php?c=1&i=550