I never can remember the name of that area up there by the Lincoln head. Something-vous? (as in rendevous) Anyway, when I was up there in '02-03, they were shutting down a lot of the trails in that area. Building big burms in the trailheads and completely tearing them out. That's why we ended up in Snowy Range a majority of the time. One of the last runs up there, we found a beautiful lake on the side of the mountain after going up a decently rocky trail. Lots of good times up there.
There is some good little "canyon's" and rocks to crawl behind the old Walmart (it's a little community college or something now, the new one is on the south side of the road). The easiest place to enter is off of the little road that cuts behind the Shoney's or whatever it is right there going over to the hospital. When the road turns left and starts up a hill, turn right down the dirt road instead. It's good for when you just want to go out for a little bit of fun. One of the funniest things I have seen was watching the national guard guys out there in the Humvees getting stuck on the simplest off-camber, little hills. They would be giving it hell, and not going any where. That's when I figured out that the H-1's aren't all what they're cracked up to be.
There are lots of trails on the west side of 287 going towards Fort Collins once you get over the pass. I never made it out there, but scoped them out on maps.