Mount Ada is located on
Baranof Island and north of
Port Alexander, Alaska. Precipitation runoff from the mountain's slopes drains north to Gut Bay, south to Patterson Bay, or east to Yermak Lake and
Chatham Strait. Although modest in elevation,
topographic relief is significant as the summit rises 4,528 feet (1,380 m) above tidewater of Chatham Strait in and 4,170 feet (1,271 m) above Yermak Lake in . The peak's name was applied in 1917 by the
United States Coast and Geodetic Survey and the toponym was officially adopted in 1918 by the
United States Board on Geographic Names. The mountain's namesake is Ada Lester Jones (1847–1920) who was the mother of
Ernest Lester Jones, the superintendent of U.S. Coast and Geodetic Survey. ==Climate==