Holland Tract

The Holland Tract is an island in the Sacramento–San Joaquin River Delta. It is part of Contra Costa County, California, and managed by Reclamation District 2025. Its coordinates are 37.99861°N, -121.60222°W, and the United States Geological Survey measured its elevation as 7 ft in 1981. It appears on a 1952 United States Geological Survey map of the area.