Mount Baker reflecting in tarn near Park Butte in the Mount Baker Wilderness
Mount Baker, also known as Koma Kulshan or simply Kulshan, is an active glaciated andesitic stratovolcano in the Cascade Volcanic Arc and the North Cascades of Washington State in the United States. Mount Baker has the second-most thermally active crater in the Cascade Range after Mount Saint Helens. About 31 miles due east of the city of Bellingham, Whatcom County, Mount Baker is the youngest volcano in the Mount Baker volcanic field. While volcanism has persisted here for some 1.5 million years, the current glaciated cone is likely no more than 140,000 years old, and possibly no older than 80-90,000 years.
After Mount Rainier, Mount Baker is the most heavily glaciated of the Cascade Range volcanoes; the volume of snow and ice on Mount Baker, 0.43 cu mi is greater than that of all the other Cascades volcanoes (except Rainier) combined. At 10,781 ft, it is the third-highest mountain in Washington State and the fifth-highest in the Cascade Range, if Little Tahoma Peak, a subpeak of Mount Rainier, and Shastina, a subpeak of Mount Shasta, are not counted. Located in the Mount Baker Wilderness, it is visible from much of Greater Victoria, Greater Vancouver, and, to the south, from Seattle (and on clear days Tacoma) in Washington.
Indigenous natives have known the mountain for thousands of years, but the first written record of the mountain is from the Spanish. Spanish explorer Gonzalo Lopez de Haro mapped it in 1790 as the Gran Montana del Carmelo, "Great Mount Carmel". The explorer George Vancouver renamed the mountain for 3rd Lieutenant Joseph Baker of HMS Discovery, who saw it on April 30, 1792.