Greenhorn is more of a gravel pit than trails, it is river bed. You do have hill climbs and short trails that wrap around, but nothing long. You can usually spend a few hours messing around, you should have some fun. Also be careful when on the far side, there are blind drop offs. You should pm Austin W , he was suppposed to beheading there last weekend. Fortysixandtwo also seems to be familar w/the area, it has been a while since I was up there other than a short trip testing out the new arb and dual cases this past summer.