Rusk Mountain is a peak located in the towns of Jewett and Lexington in Greene County, New York, USA. At 3,680 feet (1,121 m) in elevation, it is the 20th-highest peak in the Catskill Mountains and considered a member of the Catskill High Peaks. While there is no maintained trail, a bushwhack to the summit is considered relatively easy, and required for membership in the Catskill Mountain 3500 Club.