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Three Sisters

From Portland Hikers Field Guide

View of the Three Sisters from nearby Mount Scott(cfm)
View of the Three Sisters from nearby Mount Scott(cfm)
  • Latitude: 44.14754
  • Longitude: -121.78328
  • Maps: Portland Hikers Maps Google Earth
  • Elevation: 10085 feet (North Sister)
  • Elevation: 10047 feet (Middle Sister)
  • Elevation: 10358 feet (South Sister)

The Three Sisters are the dominant mountains in the area south of Mount Jefferson and east of Eugene.

Contents

Volcanic History

The Three Sisters are has a long, complicate eruptive history. North Sister, the oldest of the trio, has been inactive for over 100,000 years. Middle Sister was last active 10-12,000 year ago. While the main cone at South Sister is probably 25,000 years old, the most recent activity may be as little as 2,000 years old.

Climbing Information

North Sister and Middle Sister are difficult summits, only reachable my people with cliff climbing equipment and experience.

The summit of South Sister on the other hand, is reachable by a normal hiking trail. You'll need a lot of stamina and water, but no special equipment. The South Sister Summit Hike begins at the Devil's Lake Trailhead and climbs 4900 feet in 5.5 miles to the summit.

Hiking notes

The Three Sisters lie in the middle of the appropriately named Three Sisters Wilderness. All visitors in the area must fill out a free wilderness permit. All motorized vehicles or tools are prohibited.

Contributors

Portland Hikers Field Guide is built as a collaborative effort by its user community. While we make every effort to fact-check, information found here should be considered anecdotal. You should cross-check against other references before planning a hike. Trail routing and conditions are subject to change. Please contact us if you notice errors on this page.