South Sister is one of the three prominent volcanic peaks in the Cascade Range of Oregon, USA. Standing at 10,358 feet (3,276 meters), it is the third highest of the Three Sisters mountains. The peak is known for its striking glacial features and offers stunning views of the surrounding landscape. The mountain is a popular destination for hikers and climbers, with a well-maintained trail leading to the summit. The area around South Sister is also home to diverse wildlife and unique ecosystems, making it a significant site for both recreation and conservation efforts.