Peaks Trail
Details
Peaks Trail, a 16-mile round-trip blue/black singletrack from Frisco to Breckenridge.
Elevation change out: 1,227 feet up, 328' down.
The good news is the return trip is 1,227' down, 328’ up :-).
Blue/Black is a good description. It’s a challenge. Much of it is in shade, though, that’s a plus.
10:00am at the “Rainbow Lake and Peaks Trailhead” in Frisco.
Lat/long are 39.569030, -106.099562
MTB Project's description: https://www.mtbproject.com/trail/3587454/peaks-trail
It's national forest land, so eBikes are frowned upon.

