Trail Overview
Williams Pass Trail is a rugged, 2.9-mile out-and-back off-road route near St. Elmo that climbs to an elevation of 11,776 feet. The trail follows the historic Denver, South Park and Pacific Railroad grade through dense subalpine forests and onto fragile alpine tundra, ending near the west portal of the Alpine Tunnel. Due to a permanent rockslide blocking the western access from Tin Cup, the route must be driven as an out-and-back from the east side starting near the Hancock townsite.
The trail is rated moderately challenging (5 out of 10) due to extremely rough, rocky terrain and muddy sections, though it lacks steep drop-offs or major technical obstacles. High-clearance 4WD vehicles or capable OHVs are highly recommended. To protect the alpine environment, this trail is strictly open only during September.
Difficulty
The road is not steep, does not have drop offs or ledges or large obstacles, but it is extremely rough and muddy in spots. It was passable on a dirt bike but painful.
History
The trail traverses the historic line of the Denver, South Park and Pacific Railroad, leading towards the Alpine Tunnel. Constructed in the late 19th century, the tunnel was a major engineering feat of its time, being the first to tunnel through the Continental Divide. Multiple informational placards are placed along the trail to detail this rich history.
Access Description
The trail is strictly open from September 1st through September 30th annually to protect the fragile alpine tundra, though exact dates may vary by year based on forest service reports. Additionally, a permanent rockslide blocks access from the west (Tin Cup), meaning this trail is currently accessible only from the east (St. Elmo/Hancock) as an out-and-back route.
