Mount Deception, Mountain peak in Olympic National Park, United States

Mount Deception is a 2,374-metre peak in the Olympic Mountains, the second-highest summit in the range after Mount Olympus and the highest in the eastern Olympics. It rises at the head of Royal Basin between Deception Creek and Royal Creek, with two small glaciers on its north-facing basalt slopes. Its prominence is 1,252 metres.

The Seattle Press Expedition named the peak Mount Holmes after John H. Holmes of the Boston Herald. G.A. Whitehead of the U.S. Forest Service later renamed it Mount Deception because mountaineers struggled to find climbing routes on the often cloud-covered peak.

The name Mount Deception comes from G.A. Whitehead of the U.S. Forest Service, who renamed the peak because mountaineers had trouble finding climbing routes on its often cloud-covered summit. The adjacent Needles are regarded as offering better and somewhat more difficult mountaineering objectives in Royal Basin.

The mountain is accessed via the Upper Dungeness Trail, with a round trip of about 21 miles requiring crampons, ice axes, and a helmet. Visitors should prepare for changing weather conditions and technical alpine terrain.

Mount Deception is the highest peak of the eastern Olympics, yet it cannot be seen from Seattle. Its nearest higher summit is Mount Olympus, 21.79 miles (35.07 km) to the west. Two small glaciers cling to its north-facing basalt slopes.