A miner's river
The Durango & Silverton Narrow Gauge Railroad travels 45 miles each way along the Animas River from Durango to Silverton, an old mining town high in the San Juan Mountains. The Animas River is one of the last free-flowing rivers in the western United States and cuts through some of Colorado's most striking canyon scenery. The train crosses the river five times on its journey. Closer to Silverton, you can see the rocks along the sides of the river are discolored yellow and orange. This is from contaminants of the mining operations there.