| Sinclair Mountain | |
|---|---|
 Sinclair Mountain, west aspect | |
| Highest point | |
| Elevation | 6,800+ ft (2,070+ m)[1] |
| Prominence | 3,600 ft (1,100 m)[1] |
| Isolation | 10.95 mi (17.62 km)[2] |
| Coordinates | 59°05′48″N 135°07′26″W / 59.09667°N 135.12389°W[1] |
| Geography | |
  Sinclair Mountain Location of Sinclair Mountain in Alaska | |
| Location | Tongass National Forest Haines Borough Alaska, United States |
| Parent range | Coast Mountains Boundary Ranges |
| Topo map | USGS Skagway A-1 |
| Geology | |
| Type of rock | granite |
| Climbing | |
| First ascent | 1973 |
| Easiest route | class 5.4[2] |
Sinclair Mountain is a prominent 6,800+ ft (2,070+ m) mountain summit located in the Boundary Ranges of the Coast Mountains, in the U.S. state of Alaska. The peak is situated 26 mi (42 km) south of Skagway, and 15 mi (24 km) north of Lions Head Mountain, on land managed by Tongass National Forest. Although modest in elevation, relief is significant since Sinclair Mountain rises 6,800 feet above the entrance to Chilkoot Inlet in 3.5 mi (6 km). The peak's name was established in 1920 by the United States Coast and Geodetic Survey to remember Cephas Hempstone Sinclair (1847–1920), hydrographic and geodetic engineer who had 47 years of field service with that agency.[3] The mountain's toponym was officially adopted in 1920 by the U.S. Board on Geographic Names.[4] The first ascent of this seldom climbed peak was made in mid-June 1973 by Jerry Buckley, Joe Greenough, and Craig Lingle.[5][6]
