Big Sister Peak

Elevation: 10,954 ft
Prominence: 1,054

Climbing information for this peak is found on page 309.


This peak is most often climbed via the connecting ridge to Little Sister Peak. Class 2 via the connecting ridge. Larry Prescott climbed this peak as part of a 13 mile, 7,900 gain day which included five other peaks: Lemhi Enchainment, Little Sister to Foss Mountain

Big Sister viewed from Rust Peak. This peak ios also know as Lexis Peak. Rick Baugher Photo 10-28-90

Big Sister viewed from Rust Peak. This peak is also know as Lexis Peak. Rick Baugher Photo 10-28-90

This map,shows Larry Prescott's track from Mud Springs to Little and Big Sister peaks. Larry Prescott Map

This map,shows Larry Prescott’s track from Mud Springs to Little and Big Sister peaks. Larry Prescott Map

Big Sister from Little Sister. Larry Prescott Photo

Big Sister from Little Sister. Larry Prescott Photo

Big Sister Peak from Little Sister Peak. Dan Robbins Photo

Big Sister Peak from Little Sister Peak. Dan Robbins Photo

Mountain Range: Lemhi Range

Longitude: -113.12869   Latitude: 44.16669

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