Great biking nearby, including a popular 10.5-mile intermediate loop with 1,271 feet of climbing and descent.
Heil Valley Ranch - Picture Rock Trailhead
63 Red Gulch Road, Lyons, CO 80540, 2516050790
A combination of some of the best intermediate trails in the Boulder/Lyons area. 15.1 miles with 1,436 feet of elevation gain. Intermediate difficulty.