South Sister
SummitOregon, United States
About South Sister
South Sister is the southernmost and tallest of Oregon's Three Sisters, a cluster of glaciated Cascade volcanoes west of Bend. Its broad cone formed from rhyolite-to-andesite domes and lava flows, with its main growth ending about 30,000 years ago.
Source: U.S. Geological Survey · Public domain
Before you go
Choose an approach from the linked routes, then check its distance, gain, and starting point. View route
Current access, permit, and seasonal-closure updates are not available here. Confirm those details with the land manager before your trip. Read U.S. Geological Survey
More about this place
Weather
Forecast near South Sister · destination elevation 10,358 ft. Conditions can vary with elevation.
Full forecast → · Forecast by Open-Meteo
Seasonality
Map
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