There is a combination of forest road and singletrack here. You will ride some road so you have to keep an eye out for the singletrack. Many of the trails are actually winter ski trails built for the college to teach grooming. In addition, a few miles of good quality IMBA-standard singletrack have been added.
Heading south out of Leadville on Highway 24, turn left onto College Road. Find a place to park on or near the small campus. The trails pick up just west of the main campus.
http://www.singletracks.com/item.php?c=1&i=7542