Built in 1897 by Colonel William Dewey, the mining promoter, the Boise, Nampa and Owyhee Railroad was intended to run from Nampa to Silver City. The rails got as far as Murphy, south of the river, and trains ran that far in 1899, but the track was never completed.
The boulders in the foreground are Melon gravel, deposited by the Bonneville Flood that roared through the Snake River Canyon 30,000 years ago.
The mountain range in the background is the Owyhees, whose highest peak is 8,000 feet-plus. These photographs were taken in February, 2011.