Traildamage is pretty good for researching trails. The only caveat is that conditions can change in a short time.

TrailDamage.com

It is always a good idea to check with the relevant Ranger Districts for road status and other restrictions.

Region 2- Alerts & Notices

Since you will be in the four corners area, Mesa Verde is a must see.

There are a few scenic railways in the region:
Home :: Cumbres & Toltec Scenic Railroad :: New Mexico and Colorado
Home
Home | Durango & Silverton Narrow Gauge Railroad Train

Then there is rafting and fishing...