Capitol Peak and Snowmass Mtn are 14ers in the Elk Mountains. They are each individually long climbs, and though they are not that far apart, they are seldom climbed together.
Editor's Note: Many Colorado 14ers should not be considered “backcountry” where you go anywhere you want; their popularity can create a plethora of braided social paths that lasts for decades in the fragile tundra. So if there is a trail, please stay on it. Hundreds of volunteers with the Fourteeners Initiative work hard to protect our mountain environment.
This route on the old FKT site