We went up from UM Pass. There is a good road to the top of 10670, but from there on it was bushwhacking. The main page states "a worn trail leads to the summit from nearby UM Pass". This is not the case. Although there may be a worn trail to the summit, it doesn't go from UM Pass. The bushwhacking was unpleasant with big boulders, downed trees, and thickly spaced live trees. However, once you climb up a few hundred feet, the west side was relatively clear although the grassy areas were peppered with thorn bushes.
Too many ATV's on the UM road so I made a route up from Lost Creek, which is north of the Terrill Guard station. I just made my way up slopes and with my GPS summit waypoint, made it fine. No trail but no problem. Found a lot of rock structures on top and both a witness benchmark and central benchmark. A small communications structure is on the top as well. Couldn't find a register (if there was one). Great views in all directions. Climbed a p1k above Fishlake earlier in the day (Pk 9931). 2miles by my cross country route.