The Trap Park trailhead is off of Long Draw road next to Trap Lake. Park at the trailhead.
The trail takes off southwest along an overgrown doubletrack and should be ridden as an out and back (about 6 miles). Continue up the trail where it switchbacks through a boulder field and has some of the most difficult riding off the trail. If you look back you'll have views of Trap Lake and the valley that Long Draw road runs through.
You'll soon reach the North side of Trap Park and will ford Trap Creek. As you admire the views of the Flat Top and Iron Mountain, continue along the trail. Keep your eyes pealed for moose and raspberries as you continue. The trail ends at the wilderness boundary which is marked by a yellow sign. The hard part is over, now turn around and enjoy your descent.