Mt Bierstadt (14,060') is a popular and relatively easy 14er in the Front Range. The standard (FKT) route is about 3.5 miles from Guanella Pass to the summit, gaining roughly 2400'.
This route has a Strava segment for the ascent.
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.