Agnes Vaille Shelter, Wilderness hut in Longs Peak, Rocky Mountain National Park, Colorado.

The Agnes Vaille Shelter is a beehive-shaped stone structure above 13,400 feet (4,100 m) on the edge of the Boulder Field near the summit of Longs Peak. It has a single circular room with a conical ceiling formed by the walls and roof, entered through a door opening whose door has been removed. Two glazed windows and one filled-in opening pierce the walls, and the floor is paved with stone.

The shelter was built in 1927 by the National Park Service and reconstructed in 1935 by the Vaille family. It commemorates Agnes Vaille, who died during a winter descent in 1925.

The shelter reflects early mountaineering traditions in the Rocky Mountains and shows how safety became crucial for climbers at this altitude. It stands as a reminder of an era when climbing was a serious undertaking and people needed safe places to survive extreme conditions.

Reaching the shelter requires hiking through challenging rocky terrain, so sturdy footwear and good physical fitness are essential. Visitors should expect rapid weather changes and cold temperatures even when conditions seem mild at lower elevations.

The shelter was built using stones from its immediate surroundings, following the National Park Service rustic style designed to blend seamlessly with the mountain landscape. This approach reflects the principle of minimizing impact on the natural environment.