Camp Uncas, began in 1890, was the second Adirondack Great Camp built by William West Durant for his own use, after Camp Pine Knot, which he sold to industrialist Collis P. Huntington, due to financial difficulties. It was built on the shore of 110-acre (45 ha) Lake Mohegan, near Sagamore Camp. Uncas was completed in two years. The camp was included in a multiple property submission for listing on the National Register of Historic Places in 1986, and was listed there in 1987. The camp was designated a National Historic Landmark on October 7, 2008.