Jefferson Peak
Climbing
The first ascent of the summit was made in 1958 by Don Anderson, Bob Oram, Keith Spencer, and Robert Petersen. There are three established scrambling routes to the summit: from Goober Pond, the North Couloir, and via the East Peak. Jefferson Peak has a 250-foot-high (class 5.3) subpeak called "Tran Spire" (4,943 feet (1,507 m)) which was first climbed in 1958 by Don Anderson and Robert Petersen .
Climate
Jefferson Peak is located in the marine west coast climate zone of western North America. Weather fronts originating in the Pacific Ocean travel northeast toward the Olympic Mountains. As fronts approach, they are forced upward by the peaks (orographic lift), causing them to drop their moisture in the form of rain or snow. As a result, the Olympics experience high precipitation, especially during the winter months in the form of snowfall. Because of maritime influence, snow tends to be wet and heavy, resulting in avalanche danger. During winter months weather is usually cloudy, but due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer. The months April through August offer the most favorable weather for viewing or climbing this mountain.
Geology
The Olympic Mountains are composed of obducted clastic wedge material and oceanic crust, primarily Eocene sandstone, turbidite, and basaltic oceanic crust. The mountains were sculpted during the Pleistocene era by erosion and glaciers advancing and retreating multiple times.
Gallery
See also
References
- ^ Olympic Mountain Rescue, Olympic Mountains: A Climbing Guide, 4th Edition, 2006, Mountaineers Books, ISBN 9780898862065, page 65.
- ^ Jefferson Peak (Thorson Peak), climbersguideolympics.com
- ^ "Jefferson Peak - 5,720' WA". listsofjohn.com. Archived from the original on 2022-02-11. Retrieved 2022-02-11.
- ^ "Jefferson Peak". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2022-02-11.
- ^ Kai Huschke (2003), Washington's Wilderness Areas, Westcliffe Publishers, ISBN 9781565794412, page 48.
- ^ "Jefferson Peak, Washington". Peakbagger.com.
- ^ "Tran Spire, Washington". Peakbagger.com.
- ^ Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11: 1633–1644. ISSN 1027-5606.
- ^ McNulty, Tim (2009). Olympic National Park: A Natural History. Seattle, Washington: University of Washington Press.
- ^ Alt, D.D.; Hyndman, D.W. (1984). Roadside Geology of Washington. pp. 249–259. ISBN 0-87842-160-2.
External links
- Weather forecast: Jefferson Peak
- Mount Skokomish Wilderness U.S. Forest Service