| Blackthorn Peak | |
|---|---|
| Black Thorn | |
 Blackthorn Peak, northeast aspect | |
| Highest point | |
| Elevation | 4,117 ft (1,255 m)[1] |
| Prominence | 1,900 ft (580 m)[2] |
| Parent peak | Mount Aleutka (5200 ft)[3] |
| Isolation | 2.5 mi (4.0 km)[2] |
| Coordinates | 58°34′24″N 136°34′19″W / 58.57333°N 136.57194°W[2] |
| Geography | |
  Blackthorn Peak Location of Blackthorn Peak in Alaska | |
| Location | Glacier Bay National Park Hoonah-Angoon Alaska, United States |
| Parent range | Fairweather Range Saint Elias Mountains[2] |
| Topo map | USGS Mount Fairweather C-2 |
| Climbing | |
| First ascent | 1898 by gold prospectors[3] |
Blackthorn Peak, also known as Black Thorn, is a 4,117 foot (1,255 meter) mountain summit located at the head of Glacier Bay's Geikie Inlet in Glacier Bay National Park and Preserve, in the Fairweather Range of the Saint Elias Mountains, in southeast Alaska.[1] The mountain is situated immediately east of Geikie Glacier, 80 mi (129 km) west-northwest of Juneau, and 2.5 mi (4 km) north of Threesome Mountain, which is the nearest higher peak. Although modest in elevation, relief is significant since the mountain rises up from tidewater in a little over two miles. The mountain was given its descriptive name in 1896 by Harry Fielding Reid, an American geophysicist who studied glaciology in Glacier Bay.[1] Weather permitting, Blackthorn Peak can be seen from Glacier Bay, which is a popular destination for cruise ships. The months May through June offer the most favorable weather for viewing or climbing the peak.
