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2020 Map of Siskiyou Pass

Name: 2020 Topographic Map of Siskiyou Pass
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

Siskiyou Pass anchors this high-elevation landscape where the Siskiyou Mountains bridge the border between Oregon and California. The modern transportation corridor, marked by Old Hwy 99 S, follows a historic route through Toll Road Gap, illustrating the enduring importance of this mountain crossing. To the east, the Pacific Crest National Scenic Trail winds through rugged terrain, passing prominent landmarks such as Pilot Rock and Porcupine Mtn.

The southern portion of the map transition into the Klamath National Forest, where smaller settlements and resources like Timothy Flats and Buckhorn Springs appear. Water management is evident through the Ashland Lateral and several small reservoirs, including Porcupine Reservoir and Barrats Reservoir. This 2020 record documents the complex network of forest roads and trails that support both recreation and resource management in this critical interstate corridor.