
The Great Northern railroad anchors this 1905 landscape, cutting a vital industrial path through the high peaks of the Washington Forest Reserve. This survey captures the critical mountain corridor just after the completion of the original Cascade Tunnel, showing the precarious rail settlements of Wellington and Madison McCain PO perched near the pass. The map documents a rugged transition as the mining boom that fueled remote outposts like Monte Cristo, Mineral City, and Galena began to give way to the more permanent timber and rail infrastructure seen along the North Fork Skykomish River. Significant landmarks such as Index Mt, Sobiesky Mt, and the high waters of Blanca Lake define the terrain, while early towns like Skykomish, Index, and Baring serve as the primary valley hubs for the region's early twentieth-century development.
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