Thanks to the region's famous mountains, awesome displays of autumn color last especially long.
Depending on the elevation, leaves reach their peak beauty from mid-September to mid-November. The cascade of colors begins at 8,000-10,000 feet above sea level, where aspen trees start to turn gold in September. By October and November, stunning colors also fill the foothills.
Jessica Griffiths, managing editor of Colorado Runner, says The Devil's Head Lookout Trail in Pike National Forest, 50 miles south of Denver, is one of her favorites. "The drive on Rampart Range Road to get to the trail has pretty fall colors and when you reach the summit of the run, you have 360 degree views of the changing leaves," she says.
In addition, Rocky Mountain National Park, a 90-minute drive from Denver, and the Maroon Bells, just outside Aspen, offer tons of options for runners looking to soak in the seasonal splendor.
The Maroon Bells, which features two peaks, is one of the most photographed places in the state during the fall, making it a go-to stop for trail runners and photographers.
The trails at Golden Gate Canyon State Park, 20-miles west of Denver, won't disappoint either.