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1989 Map of Lake Philippa

Name: 1989 Topographic Map of Lake Philippa
Creator: U.S. Geological Survey
Published: 1989
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1989

About this map

The Middle Fork Snoqualmie River carves a deep valley through this high-elevation portion of the Snoqualmie National Forest, providing a central axis for the surrounding mountain peaks. High ridges are defined by landmarks such as Bessemer Mountain and Garfield Mountain, while the hydrology is characterized by numerous glacial tarns including Lake Philippa, Sunday Lake, and Marten Lake.

Evidence of historical resource extraction is scattered across the landscape, including an adit near Quartz Creek and a mine shaft further north, indicating the reach of early prospecting into the Alpine Lakes Wilderness. The presence of several borrow pits and a primitive 4wd road network suggests the infrastructure developed for logging and mining access before wilderness designations limited further development. The junction of the Pratt River with the Snoqualmie marks a key geographic waypoint in this steep, river-carved terrain.