Mount Stuart, Granite summit in Chelan County, United States.

Mount Stuart is a granite mountain in the Cascade Range, the highest peak of the Stuart Range and the second-highest non-volcanic peak in Washington. Its south face rises 5,000 feet in just two horizontal miles, and the rock is broken by extensive jointing. Three glaciers—Stuart, Ice Cliff and Sherpa—lie on the north slopes.

George B. McClellan named the peak in September 1853 for his friend Capt. James Stuart, who died on June 18, 1851, after an arrow wound suffered in a skirmish at the base of the Siskiyou Mountains. Frank Tweedy climbed Mount Stuart on August 5, 1883, and again two days later with Richard Goode; they found no sign of an earlier ascent.

The name honours Captain James Stuart, a friend of George B. McClellan who died in 1851 after an arrow wound in southwest Oregon. Climbers today follow the Cascadian Couloir, the standard route up the southeast flank, which ends on a false summit below the main top. Tweedy's pussypaws, a plant named after surveyor Frank Tweedy, grows in the range.

Visitors should prepare for alpine conditions and bring specialized equipment depending on the chosen route. The ascent requires mountaineering knowledge and experience with rock and possibly glacier travel.

The mountain stands out for its sharp steepness, with the elevation gain concentrated over a relatively short horizontal distance. This gives it a distinctive character among climbers compared to other peaks in the Cascades.