Naval Support Facility Thurmont, popularly known as Camp David, is a mountain based military camp in Frederick County, Maryland used as a country retreat and for high alert protection of the President of the United States and his guests.

First known as Hi-Catoctin, Camp David was originally built as a camp for federal government agents and their families, by the WPA, starting in 1935, opening in 1938. In 1942 it was converted to a presidential retreat by President Franklin D. Roosevelt and renamed U.S.S. Shangri-La. Camp David received its present name from Dwight Eisenhower, in honor of his grandson, Dwight David Eisenhower II.

The camp is very isolated and quiet. The compound consists of several cabins hidden throughout the woods, connected only by small mulch walking paths. These cabins are all named after various trees, plants, and flowers. There is only one main road on the compound, essentially cutting the camp in two parts: one side in which the Marines and Naval personnel live, eat and train; and the other side consisting of all the guest cabins and presidential recreational facilities.