The Silverton Northern Railroad, now defunct, was an American 3 ft (914 mm) Narrow Gauge Railroad constructed to reach the mining area north of Silverton, Colorado along the upper Animas River. This line was the third railroad project built by known Colorado toll road builder and Russian Immigrant Otto Mears, beginning in 1889 as a branch of the Silverton Railroad to Eureka. Incorporated in 1895 as the Silverton Northern Railroad, the line was projected to run past Eureka to Animas Forks and on to Mineral Point and then on to Lake City via Henson Creek, including a proposed three-quarter-mile tunnel through the mountains. However, Animas Forks was the end of the line, which was reached in 1896.