Mount Thielsen
Mount Thielsen rises to 2,799 m in Oregon. Mount Bailey stands 2,551 m to the west, 7.7 miles off. The nearest named place is Howlock Mountain, a peak 3.0 miles away. Rogue-Umpqua passes 2.9 miles off.
The story
Mount Thielsen (Klamath: hisc’akwaleeʔas), is an extinct shield volcano in the Oregon High Cascades, near Mount Bailey. Because eruptive activity ceased 250,000 years ago, glaciers have heavily eroded the volcano's structure, creating precipitous slopes and a horn-like peak. The spire-like shape of Thielsen attracts lightning strikes and creates fulgurite, an unusual mineral. The prominent horn forms a centerpiece for the Mount Thielsen Wilderness, a reserve for recreational activities such as skiing and hiking. Thielsen is one of Oregon's Matterhorns. Thielsen was produced by subduction of the Juan de Fuca Plate under the North American Plate. Volcanism near the Cascades dates back to 55 million years ago (mya), and extends from British Columbia to California. Thielsen is part of the High Cascades, a branch of the main Cascades range that includes several Oregon volcanoes less than 3.5 million years old; it is also a member of a group of extinct volcanoes distinguished by their sharp peaks. The area surrounding the volcano was originally inhabited by Klamath Native Americans, and was later encountered by settlers. One of the visitors was Jon Hurlburt, an early explorer of the area who named the volcano after the engineer Hans Thielsen. Later explorers discovered nearby Crater Lake. The volcano was not analyzed until 1884, when a team from the United States Geological Survey sampled its fulgurite deposits.
From Wikipedia, CC BY-SA 4.0.
Wikidata Q1481220, referenced by the OpenStreetMap record.
What the record says
- Elevation
- 2799.4 m
How to reach it
- 2.9 mi off the Rogue-Umpqua, National
- 4.4 mi off the Volcanic Legacy, National
- 24.4 mi off the Cascade Lakes, National
Overlooks nearby
- Diamond Lake Viewpoint · 4 mi
- Mt Thielson Viewpoint · 4 mi
- Mazama Viewpoint · 9 mi
- Merriam Point · 14 mi
Named places within 25 miles
- Howlock Mountain: 3.0 mi
- Summit Rock: 3.7 mi
- Tipsoo Peak: 4.7 mi
- Wits End: 5.4 mi
- Red Cone: 5.5 mi
- Rugged Crest: 12.1 mi
- Hamaker Bluff: 12.2 mi
- Palisades: 12.7 mi
- Rugged Crest Palisades: 12.8 mi
- Palisades: 13.0 mi
- Boundary Springs: 10.2 mi
- Crystal Springs: 11.7 mi
- Red Cone Spring: 12.5 mi
- Cascade Spring: 14.0 mi
- Pothole Spring: 15.3 mi
- Clearwater Falls: 10.5 mi
- Rough Rider Falls: 12.2 mi
- Lemolo Falls: 15.4 mi
- Alkali Falls: 16.2 mi
- National Falls: 16.4 mi
- Digit Point Day Use Area/Boat Lauch: 7.1 mi
- Watson Falls Picnic Ground: 17.6 mi
- Vidae Falls Picnic Area: 18.8 mi
- Goodbye Picnic Area: 20.0 mi
- Goodbye Picnic Area: 20.0 mi
- Hurryon Camp: 15.0 mi
- Rolling Grounds Camp: 19.4 mi
- Scott Creek Campground: 19.8 mi
- Beaver Marsh Rest Area - Northbound: 14.2 mi
- Beaver Marsh Rest Area - Southbound: 14.3 mi
- Stephen Tyng Mather Plaque: 17.2 mi
- Crater Lake Lodge History: 17.2 mi
- Umpqua Hot Springs: 18.0 mi
- Lady of the Woods: 18.0 mi
Other summits around it
The highest named summits within 16.1 miles of Mount Thielsen. Elevation from each summit’s own record; bearing measured between the two coordinates.
| Summit | Bearing | Elevation | Distance |
|---|---|---|---|
| Mount Bailey | W 271° | 2,550.6 m | 7.7 mi |
| Howlock Mountain | NNE 27° | 2,546.299 m | 3.0 mi |
| Llao Rock | SSW 196° | 2,453 m | 12.9 mi |
| Cloudcap | S 175° | 2,444 m | 15.4 mi |
| The Watchman | SSW 200° | 2,442 m | 15.5 mi |
| Tipsoo Peak | NNE 18° | 2,440 m | 4.7 mi |
| Hillman Peak | SSW 200° | 2,433 m | 14.8 mi |
| Williams Crater | SSW 203° | 2,315 m | 14.9 mi |
When to go
Light through the year
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:12 | 18:43 | 19:21 |
| June solstice | 05:29 | 20:09 | 20:52 |
| September equinox | 06:56 | 18:30 | 19:07 |
| December solstice | 07:38 | 15:50 | 16:37 |
Local time (America/Los_Angeles).
Climate normals
Months averaging 50–80 °F: Jun–Sep.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °F | 26 | 29 | 34 | 39 | 47 | 53 | 61 | 59 | 53 | 42 | 32 | 26 |
| Precip in | 4.6 | 3.2 | 2.7 | 1.6 | 1.5 | 1.3 | 0.5 | 0.6 | 0.5 | 1.6 | 3.2 | 5.3 |
1991–2020 U.S. Climate Normals, NOAA NCEI — Chemult, 15 mi away.
Where this comes from
Location and category confirmed against OpenStreetMap.
OpenStreetMapWikidataOpenStreetMap element node/357316681
Day trips start here
- Crater Lake National Park · 15 mi
Take the scenic way to Mount Thielsen.
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