Rusk Mountain is a 3,680-foot Catskill High Peak on the border of Jewett and Lexington, notable as the highest point of the Lexington Range and as a required climb for the Catskill Mountain 3500 Club despite having no maintained summit trail. Named for Samuel Rusk, who assisted Arnold Henri Guyot’s survey of the Catskills in the 1870s and 1880s, it may have been first recorded during that work. Much of the mountain lies in New York’s Forest Preserve, where its woods show both untouched eastern hemlock in Ox Hollow and evidence of past logging, while its runoff flows into the Schoharie Reservoir system.