Trail Overview
The route around Dotsero Crater presents varying terrain that changes noticeably as you move from west to east. On the western approach, the hills are steep with loose rock and noticeable erosion, demanding careful throttle control and line choice even though the terrain isn’t technically obstacle-laden. The surface consists of silt-like dirt and sections of soft, deep volcanic cinders and small rock, which can make traction inconsistent. As you continue east, the route flattens some but shares space with mining activity and truck traffic, so caution and awareness are required. This run is best traveled west to east, starting with the rougher, eroded climbs and ending with the more industrial terrain near Dotsero.
History
Dotsero Crater is Colorado’s youngest volcano, having erupted about 4,200 years ago. The eruption left behind a 2,300-foot-wide crater, extensive lava flows, and layers of volcanic cinders that now shape the trail’s unique surface. The volcano sits at the junction of the Eagle and Colorado Rivers and is classified as potentially active by the U.S. Geological Survey. Its eruption produced both lava flows and a massive mudflow that extended several miles downstream along the Colorado River, altering the valley floor. Today, mining operations on the eastern side of the crater extract lightweight cinders for industrial use, which is why truck traffic is common in that section. The crater and its lava beds are a rare geologic site in the state, offering a stark contrast to the surrounding canyon and high-desert landscape.
