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Fishing: Colorado > Grand Mesa, Uncompahgre and Gunnison National Forests > Taylor River Ranger District

Quick Facts

Costo Lake

Elevation: 10,300 Feet (3210.7 Meters)
Handicapped Accessible: No
Other Maps: Trails Illustrated 133
Recommended Season: Early Fall
Trail Number: 425
Usage: Heavy in Summer
USGS Map: Anthracite Range
Vehicle Accessibility: Passenger Vehicle

Satellite and Topo Map

General Description

This beautiful lake is in the West Elk Wilderness and receives heavy camping use around the lake, that may limit site availability. The Castles rock formation provides a beautiful setting for this alpine lake. The lake supports brook trout and good fishing.

Directions from Ohio Pass Road: Access into Costo Lake is lengthy due to private property closing of Castle Creek. Access may be gained via Ohio Pass Road, Forest Road 730. Begin at the Swampy Pass Trailhead and travel westward nine and a half miles to Swampy Pass. At the pass trail #438 leads to the south (left), take this trail. Follow this path passed trail #441. A short distance passed this you'll reach an intersection with the Costo Lake Trail, #425, and trail #438. The lake is one and a half miles west of the junction with trail #438.

Seasonal Information:
Normal Services Available: June through Early October .

Current Conditions & Trip Reports

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Recreation Opportunities
Activity Remarks On Site
ICON Backpacking Swampy Pass Trail
ICON Cold Water Fishing Costo Lake
ICON Hiking & Walking Swampy Pass Trail, Costo Lake Trail, Lowline Trail
ICON Horseback Riding Costo Lake Trail, Swampy Pass Trail, Lowline Trail
ICON Stock Packing Costo Lake Trail, Swampy Pass Trail, Lowline Trail
ICON Bird Identification Costo Lake Trail, Swampy Pass Trail, Lowline Trail
ICON Plant Identification Costo Lake Trail, Swampy Pass Trail, Lowline Trail
ICON Lakes & Reservoirs Costo Lake
ICON Viewing Scenery Costo Lake

Related Activities
Castle Creek - Castle Creek joins Ohio Creek approximately six miles south of Ohio Pass. This creek supports brook trout, brown trout and fair fishing.

Lowline Trail - This trail is a good access for the entire east side of the West Elk Wilderness and is an excellent trail for extended pack trips.

Mill Castle Trail - This trail goes through rugged terrain, but is one of the most scenic trails in the West Elk Wilderness.

Swampy Pass Trail - Swampy Pass Trail is a good access to the West Elk Wilderness from the Ohio Creek Road. The trail is very scenic.

More Information

Visitor Information:

Gunnison National Forest, 216 North Colorado , Gunnison, CO, 81230, Phone: 970-641-0471


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