Climb and descent. Access to the trail from several spots, best to park at bottom and ride up.
Singletrack steady climb up Chimney Gulch, out of Golden. Crosses Lookout Mountain Road twice. Trail is linkable with Apex Park. No trail traffic. Best ride is to out and back Chimney Gulch with Apex Park.
How to get there:
Golden, CO: Lookout Mountain Road. No trailhead, parking for 3 to 4 cars on the left after +/- 1.0 miles on Lookout Mountain Road. Or park up top where trail crosses Lookout Mt.. Road.
Altitude and climbing will get your heart rate up.