A fine pair of maps that illustrate in great detail the development of the park from its original grant up to 1910. The first map (21.3 x 14.5") is a product of Capt. G.M. Wheeler's Expeditions of 1877-79 with the U.S. Geographic Surveys West of the 100th Meridian. It depicts the state park boundaries and the "toll roads" leading to the park. It also locates early camp facilities, trails, and Indian settlements. Salient geographic features are identified in considerable detail. The skillful rendering of the topography has created a remarkable strong graphic image of this picturesque valley. Mountain drawings by J.E. Weyss, lettering by M. Franke, from the topographical plat by Lt. Macomb, Nov. 30, 1883.

The second map (28.8 x 27.5") was published by the Department of the Interior from surveys conducted by Marshall and Sylvester during the years 1893-94, 1896, 1898-99, and 1905. This updated edition was published in April, 1910. It is a beautifully drawn chart that shows in great detail the topography, watershed and development of the park. Large legend identifies 28 natural and manmade features including boundaries, outposts, telephone and telegraph lines, roads, trails, railroads, contours, glaciers, springs, and more.

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Condition: A

Both issued folding, now pressed and backed with archival tissue.