Mount Anderson is a 7,330-foot peak in the central Olympic Mountains within Olympic National Park, notable for its remote setting, glacial landscape, and position on the Anderson Massif as its second-highest summit after West Peak. Repeated Pleistocene glaciation carved its cirques and steep upper slopes, and glaciers have occupied several sides of the mountain. The peak also marks the meeting point of three major Olympic watersheds, sending runoff toward the Dosewallips and Quinault rivers and, from its northwest side, toward the Hayes River and the Strait of Juan de Fuca. Army Lieutenant Joseph O'Neil named it for Thomas M. Anderson, and its first recorded ascent came in 1920.