Boundary Peak 77 is a summit located in Hoonah-Angoon County, Alaska. It appears on the Sumdum D-3 SW USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 6,835.01 feet (2,083.31 m) above sea level. The nearest populated place is Sumdum (historical), approximately 25.4 miles to the WSW.