Not sure of the Northern area of CO, but just southwest of Denver is the Rampart Range riding area and just south of that is Woodland Park. Great woods riding. Large and fun.
Rampart directions: C470 to Santa Fe (85). South 10 miles to Sedalia. West at the light (Sedalia Bar and Grill) for 10 miles to the entrance of Rampart Range. Park and ride. Get a map at a bike shop. Need OHV stickers (get from a bike shop).
With the snow storm we are getting today, probably won't be ridable for a couple of weeks.
------------------
Dougie
'99 WR400 with a lot of extra dumb, stupid, here take my money, I have to have them but they don't make be a better rider mods. My wife is not happy.