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2017 Map of Wallace Lake

Name: 2017 Topographic Map of Wallace Lake
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Snoqualmie National Forest dominates this landscape, where the Cascades' western slopes drop toward the Skykomish Valley. The high-elevation terrain is defined by the massive Spada Lake reservoir and the surrounding Sultan Basin, a critical watershed managed for water supply and forest resources. The Sultan River and Pilchuck River headwaters carve through the ridges, creating a complex drainage network that includes several smaller alpine bodies of water such as Wallace Lake, Jay Lake, and Shaw Lake.

In the southwestern corner, the settlement of Startup marks the transition from the steep, timbered elevations of Sultan Ridge to the lower valley floor. A web of forest service roads, including Sultan Basin Rd and Nat For Dev Rd 6120, provides access to remote landmarks like Olney Pass and Olney Falls. This map illustrates the intersection of public land management, hydroelectric and water infrastructure, and the natural drainage of the N Fork Wallace River during the early 21st century.