Mount Russell, Granite mountain peak in Tulare County, California.

Mount Russell is a granite peak on the Sierra Crest, rising to 14,094 feet (4,296 m) just 0.8 miles (1.3 km) north of Mount Whitney. Its summit sits on the boundary between Inyo National Forest and Sequoia National Park, and between Inyo and Tulare counties. The peak rises southwest of Tulainyo Lake, one of the highest and largest alpine lakes of the southern Sierra.

The first ascent of Mount Russell was made on June 24, 1926, by Sierra mountaineer Norman Clyde. The peak was named for Israel Cook Russell, a geologist of the Wheeler Survey known for his explorations in Alaska. It rises just southwest of Tulainyo Lake on the Sierra Crest, which here marks the boundary between Inyo National Forest and Sequoia National Park.

The peak honors Israel Cook Russell, a geologist of the Wheeler Survey known for his explorations in Alaska. The name appears on maps and climbing guides, while the mountain itself is often called simply Russell by Sierra climbers. Its summit register, placed by the Sierra Club, records visits from climbers who often combine it with Mount Whitney.

Summer climbers need to obtain permits from the U.S. Forest Service, with the trailhead starting at Whitney Portal. The best climbing season runs from July through September after snow has melted from the higher elevations.

Mount Russell sits on the Sierra Crest, which here forms the boundary between John Muir Wilderness in Inyo National Forest and Sequoia National Park, and between Inyo and Tulare counties. Tulainyo Lake, one of the highest and largest alpine lakes of the southern Sierra, lies just northeast of the summit.