Forbidden Peak is an 8,815 feet (2,687 m) glacial horn located in North Cascades National Park, in Skagit County of Washington state. It is part of the North Cascades and is located near Cascade Pass. Forbidden Peak features a rock climbing route named West Ridge route which is featured in Fifty Classic Climbs of North America. The peak was first climbed by a party consisting of Fred Beckey, his brother Helmy Beckey, Jim Crooks, Lloyd Anderson and Dave Lind in 1940.

North Cascades National Park is an American national park in the state of Washington. At more than 500,000 acres (200,000 ha), it is the largest of the three National Park Service units that comprise the North Cascades National Park Complex. North Cascades National Park consists of a northern and southern section, bisected by the Skagit River that flows through the reservoirs of Ross Lake National Recreation Area. Lake Chelan National Recreation Area lies on the southern border of the south unit of the park. In addition to the two national recreation areas, other protected lands including several national forests and wilderness areas, as well as Canadian provincial parks in British Columbia, nearly surround the park. North Cascades National Park features the rugged mountain peaks of the North Cascades Range, the most expansive glacial system in the contiguous United States, the headwaters of numerous waterways, and vast forests with the highest degree of flora biodiversity of any American national park.