Loup Loup Pass, Road mountain pass in Okanogan County, United States

Loup Loup Pass is a mountain crossing where State Route 20 links the towns of Twisp and Okanogan in Washington State. The pass sits at about 1,225 meters (4,020 feet) elevation and serves as a key transportation corridor through the Cascade Mountains.

Loup Loup Pass lies on the route of Washington State Route 20, the highway that crosses the North Cascades between Twisp to the west and Okanogan to the east. The pass sits at 4,020 feet (1,225 m) on the edge of Okanogan National Forest. A small ski area operates at the pass, using the road access and the pass's terrain.

The name Loup Loup is French for "wolf wolf," a doubling that likely came from French-speaking fur traders or voyageurs who passed through the Okanogan country. The pass sits at the eastern edge of Okanogan National Forest, and the surrounding valley and ski area carry the same doubled name.

Visitors can explore ski trails of varying difficulty at Loup Loup Ski Bowl, which covers around 300 acres of terrain. The road is open year-round, though winter driving may require winter tires or chains depending on conditions.

Loup Loup Pass sits at 4,020 feet (1,225 m) on State Route 20, and the pass marks the edge of Okanogan National Forest. The name is a reduplication of the French word for wolf, "loup", a reminder of the French-speaking trappers and traders who once worked this part of the North Cascades.