Mount Jefferson is a stratovolcano in the Cascade Volcanic Arc, part of the Cascade Range in the U.S. state of Oregon. The second highest mountain in Oregon, it is situated within Linn County, Jefferson County, and Marion County and forms part of the Mount Jefferson Wilderness.

At 10,495 feet in elevation, Mount Jefferson ranks as the second highest peak in Oregon. Mount Jefferson is a stratovolcano that has erupted periodically over the past 300,000 years. The volcano can produce large, explosive eruptions, and the last one was about 15,000 years ago.

Mount Jefferson is the second highest peak in Oregon and because of its summit pinnacle requiring Class 4 scrambling on very steep, usually ice-encrusted rock, it is considered by some to be the most difficult of the higher volcanoes (above 10,000').

Mount Jefferson (3,199 m, 10,495 ft) is the second tallest mountain in Oregon (after Mount Hood) and the only major volcanic center in the U.S. portion of the Cascade Range that hasn't erupted in the past 10,000 years.

Mt. Jefferson is the second highest peak in Oregon. This beautiful mountain lies on the Cascade Crest, about 40 miles south of Mt. Hood, in the Mt. Jefferson Wilderness Area. The Summit Pinnacle is 5.3 by the easiest route but there are quality 5.8 moves up there if you seek them out.

Proceed cautiously on this 20.9-mile out-and-back trail near Idanha, Oregon. Generally considered a highly challenging route, it should only be attempted by experienced adventurers. This is a popular trail for backpacking, birding, and camping, but you can still enjoy some solitude during quieter times of day.

Apr 30, 2025 · Continue on the gravel road for views of Mount Jefferson and 7.5 miles to the Whitewater Creek Trailhead. Map Zach Urness has been an outdoors reporter in Oregon for 18 years and is host of the ...

Nov 7, 2023 · Mount Jefferson is a prominent feature of the landscape seen from highways east and west of the Cascades. The volcano has erupted repeatedly for hundreds of thousands of years beginning about 300,000 years ago.

Mar 24, 2025 · Climbing Oregon’s Mount Jefferson. The 10,497-foot Mt. Jefferson is no walk-up. While Hood gets the crowds and Sisters has the views, Jefferson combines glacier crossings, loose rock, and complicated approaches into one of Oregon’s most challenging climbs. Here’s what you’re getting into.

At 10,497 feet (3,199 m), Mount Jefferson is the second tallest mountain in Oregon. It is a stratovolcano with slopes mantled by five glaciers - Whitewater, Waldo, Milk Creek, Russell, and Jefferson Park.