Union Park ATV Trail Professional Review and Guide
"Route serves as an introduction to Union Park. Trails #10, #11, and #12 are also in Union Park, but are more difficult. Much of this trip is on F.S. 758, a high ridge above Union Park. This road is mostly in the trees, but openings allow views along the way.
To extend trip, continue on to Union Canyon, Trail #10, Cross Mountain, Trail #11, Gold/Cameron Creeks, Trail #12, and Slaughterhouse Gulch, Trail #13. Trail #13 takes you into Tincup."