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1968 Map of Oss Peak

Name: 1968 Topographic Map of Oss Peak
Creator: U.S. Geological Survey
Published: 1981
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1981

About this map

The rugged heights of Oss Peak and Parrish Peak define this high-altitude landscape where the Okanogan National Forest meets the Wenatchee National Forest. At the southern edge of the sheet, the deep waters of Lake Chelan emerge, marked by Dutch Harbor and the Grace Aqueduct. This terrain is characterized by steep ridges like McFarland Ridge and Sawtooth Ridge, which separate a complex network of drainages including Fisher Creek and Poison Creek.

Evidence of remote human activity appears in the form of Camp Four, the Poison Creek Campground, and a series of rugged trails such as the Pack Trail and Squaw Trail. The presence of several Borrow Pit sites and a Siphon reflects the engineering required to manage water and transit in this vertical environment. For researchers, the map provides a clear record of the boundary between Okanogan Co and Chelan Co as it was surveyed in the late 1960s.