Spencer Basin - Highland Mary Loop

About

The Spencer Basin - Highland Mary Loop is a 12.3-mile difficult hike located near Silverton, Colorado. The route traverses alpine terrain without tree cover, offering expansive views of surrounding peaks. The trail typically starts at the end of the Cunningham Gulch road, which provides parking after a climb, though it can also be accessed via the Highland Mary Lakes Trail #606. Hikers should expect rugged conditions and navigation challenges, particularly where willows block the path in less-frequented sections. The trail gains significant elevation, reaching approximately 12,781 feet, and requires about 8 hours to complete. Wildlife sightings often include mountain goats and marmots. The loop connects with the Whitehead Trail and Highland Mary Lakes, allowing for extended routing options.