Hiking the Colorado River Trail in Rocky Mountain National Park

Photo of the Colorado River at the site of the abandoned mining town Lulu City in Rocky Mountain National Park during the fall of 2025.
The Colorado River at the site of Lulu City in the fall of 2025. Beautiful remote mountain setting. 

These are the headwaters of the Colorado River (a tiny stream here). This trail goes by the vanished town Lulu City and later reaches the Little Yellowstone Canyon. Lulu City was a mining town of about 200 that only survived five years (1879-1884). The hike was over ten miles - roundtrip. We didn't see hikers after Lulu City. The park is rebuilding the trails by the canyon. Some landslides around there. 

Where is the trailhead of the Colorado River Trail? - Map my location.