Rent a jeep or a decent 4x4 truck.
- Black canyon national monument. Pretty cool place. Watch that first step, it's a long one.
- Visit the Black Mesa / West elk wilderness area. You can take a truck or jeep right to the edge of the wilderness area. Spectacular view. It would be a solid 2 hours driving on the top of the mesa. There are designated trails up one side of the mesa, across and then down the other side of the mesa.
- Visit the small towns on the western slope of Colorado. Hodgekiss, Delta, Crawford, Marble, Steamboat springs. If you're into Antiques at all or western stuff, these towns have it.
- Drive and view the different passes. McClurg pass is pretty awesome.
- Glennwood springs - go to the hot springs for a half day or so. Pretty awesome town too - stop by Jucy Lucy's for dinner, AWESOME place to eat.
- Stop off by Aspen and Vail, might as well see them. I think they have hiking trails in the summer time - I've only been there in the winter and to Colorado for hunting.
- White water rafting (if they have water). Hit it up, I know there are places in Vail that can hook you up with a trip.
- If you want to camp and hike, it takes about 3-4 days but you can walk from the West Elk Winderness in Crawford, to Paonia.
- Stop by Homestead Meats in either Paonia or in Montrose. I know the owners, pretty awesome guy. Does outfitter hunts / trophy hunts, long with having a huge cattle ranch.
- Go to the ghost towns along route 70.
- I'll think of some other things....