Hunter Creek Trail, Aspen, Colorado
Why Run it: The town is called Aspen for a reason, and when the leaves start turning on this gem of a trail, all that glitters is gold. This trail starts on the north end of glitzy-but-naturally stunning downtown Aspen, at 7,850 feet in elevation (so don't let your ego be bruised by your huffing and puffing). Upon immediate envelopment by aspen trees, with golden leaves decorating the trail floor and occasional wooden bridge, you're climbing uphill…but it's a gradual climb on a mostly smooth, buffed out dirt with some large boulders strewn about, in places. After a couple of miles, you pop out into a meadow with views of the surrounding Elk Mountains, and top out at 8,750 feet. Run an out-and-back to the meadow for 4.2 miles of fall beauty.
More Info: fs.usda.gov