Fortress Mountain is a summit located in North Slope County, Alaska. It appears on the Chandler Lake C-5 SW USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 2,939.99 feet (896.11 m) above sea level. The nearest populated place is Nu-dru-vuk-puk (historical), approximately 24.6 miles to the SSE.