Blair Lake

Managing agency

Pike-San Isabel NF — San Carlos RD

Blair Lake is an 11.9-mile out-and-back trail located in Colorado near Colorado, managed by Pike-San Isabel National Forest's San Carlos Ranger District. The route features 1,547 feet of elevation gain, making it a moderately challenging day hike. The trail takes hikers through terrain managed by the U.S. Forest Service, offering access to backcountry areas within the Pike-San Isabel National Forest. The out-and-back format means you'll return via the same route, covering approximately 24 miles total distance if completing the full hike to Blair Lake and back. With over 1,500 feet of elevation gain spread across 11.9 miles, the ascent is relatively gradual, averaging about 130 feet per mile. This makes the trail accessible to hikers with moderate fitness levels, though the total distance and elevation should be considered when planning your day. Before heading out, contact the San Carlos Ranger District for current trail conditions, seasonal closures, and any required permits. Spring snowmelt and summer thunderstorms are typical weather considerations for this area.