A plaque on Frenchman’s Cabin says it was built in 1894. This cabin marks entry into the Lincoln Mining District. Silver was the primary ore mined here starting in the 1880s. Development of the area was hindered by the fact that ore had to be hauled all the way to Leadville. A resurgence in mining occurred in 1900 when the Ruby Mines and Development Company took over the operation. They built a 50-ton concentrating mill, then shipped the ore to nearby Aspen, which improved profits. Operations eventually shut down in 1912.