Lake Constantine is a pristine alpine lake tucked into the Gore Range in Eagle County, accessible only by a rewarding backcountry hike through some of Colorado's most unspoiled mountain terrain. With a perfect 5.0 rating from visitors, this high-altitude gem delivers the kind of wilderness experience that keeps backpackers and anglers coming back season after season.
The hike to Lake Constantine covers roughly 6 miles round trip with significant elevation gain, passing through dense conifer forests and wildflower-filled meadows before arriving at the lake basin. The trail is well-defined but moderately strenuous, making it best suited for hikers with at least intermediate experience. The payoff at the top is a crystal-clear alpine lake surrounded by dramatic rocky peaks, with minimal human development in sight.
Fly fishing is a primary draw at Lake Constantine. Visitors report healthy populations of trout in the cold, clear water, and the remote setting means far less angling pressure than lakes accessible by road. Bring your fly rod and expect to work for your catch in a spectacular setting. The lake's high elevation means the fishing season is compressed, typically running from late June through September depending on snowpack.
Backpackers often use Lake Constantine as an overnight destination, setting up camp near the lake to enjoy sunset and sunrise over the Gore Range. If you plan to camp, practice strict Leave No Trace principles, as the fragile alpine environment shows damage quickly. There are no developed campsites, fire rings, or facilities of any kind at the lake.
Mosquito activity can be intense during summer days at this elevation, tapering off after sunset as temperatures drop. Bring quality insect repellent and consider a head net for the warmest months. Weather at this altitude changes rapidly, so pack layers and rain gear regardless of the forecast.
Lake Constantine rewards those willing to put in the miles. The combination of challenging terrain, world-class scenery, and productive fly fishing in a wilderness setting makes it one of Eagle County's finest backcountry destinations. Plan your visit for mid-summer through early fall when the trail is snow-free and the fishing is at its peak.