George Woolworth Colton and Charles B. Colton.

New York: William Mann & Son Stationers and Printers; Prepared by G.W. & C.B. Colton & Co., [1887].

Large map [22 x 33″; 31 x 40″ in mat and frame]. With fold lines, and very occasional small splits along the folds.

With a key at the lower left which states the various lines represented: Central Pacific and Branches; Union Pacific and Branches; Central Branch U.P.R.R.; Sioux City and Pacific; Southern Pacific and Branches; Portions aided by U.S. Bonds.

A highly detailed and dense railroad map of the western United States showing by hachures, drainage, city and towns, Indian reservation, military posts, and the railroad network with primary lines in color. The map, displaying the United States from the west coast to the Mississippi River, was published to accompany the monumental multi-volume report issued the same year by the United States Pacific Railway Commission.