Stevens Pass Historic District, Historical railroad district in King and Chelan Counties, United States.

Stevens Pass Historic District is a 3.2-by-18.2-mile rectangle of mountainous terrain in the Cascade Range, running from the Martin Creek Tunnel on the west slope to the eastern portal of the present Cascade Tunnel above Nason Creek. Within it lie the remains of the Great Northern Railway's crossings: the 1890s switchback grades, the 1900 tunnel with its concrete-faced portals, and the Windy Point and Horseshoe tunnels of 1911.

The Great Northern Railway constructed this mountain crossing in the late 1800s to connect eastern and western Washington for the first time by rail. This engineering effort overcame one of the most challenging terrain barriers on the West Coast.

The district reflects how railroad construction linked distant communities and shaped mountain life through transportation routes. Visitors can observe how the structures and pathways still define how this remote region connects to the broader world.

The district stretches 3.2 by 18.2 miles from the Martin Creek Tunnel to the eastern portal of the Cascade Tunnel, about 45 miles east of Seattle. US Highway 2 crosses the pass at an elevation slightly above 4,000 feet. The terrain is mountainous with timber and granitic outcroppings, so plan for steep slopes and changeable weather.

Before the 1910 Wellington Disaster, 17 snow sheds covered 7,593 feet of track; they did not block slides but carried debris over the right of way. A 3,900-foot double-track reinforced concrete shed at Wellington is believed to be the first of its kind.