Report of an expedition from Fort Colville to Puget Sound, Washington Territory, by way of Lake Chelan & Skagit River examines the grueling military reconnaissance and overland pathfinding situated across the formidable, heavily glaciated divide of the North Cascade mountains. Pierce details how the region's extreme vertical topography—specifically the deep, glacially carved trench of Lake Chelan, the jagged alpine ridges of the Cascade crest, and the precipitous, densely forested river gorge of the upper Skagit—strictly dictated the treacherous margins of territorial exploration and early routing. By mapping the expedition's agonizing physical progression over high mountain passes and through the impenetrable western-slope temperate rainforests, the narrative highlights how this specific cordilleran geography anchored early governmental attempts to forge a viable transit corridor between the arid interior Columbia Plateau and the maritime Puget Sound basin. Ultimately, this military record serves as a macro-level spatial history, demonstrating how the sheer geological wall and immense topographic hostility of this Pacific Northwest frontier fundamentally shaped the highly constrained, physically punishing character of trans-Cascade exploration.

Discoveries in geography, North America Skagit River Valley, Pierce, Henry Hubbard, Skagit River Valley (B.C. and Wash.) Discovery and exploration, Skagit, Vallée du (C.-B. et Wash.) Découverte et exploration

Reprint of the 1883 ed. published by the Govt. Print. Off., Washington

Reprint of the 1883 ed. published by the Govt. Print. Off., Washington