2017 Map of Siskiyou Pass

About this map

Siskiyou Pass serves as the central crossing for this survey of the northern Siskiyou Mountains, where the modern interstate corridor parallels historic routes like Old Hwy 99 and the Pacific Crest National Scenic Trail. The landscape is defined by prominent geological features such as the volcanic plug of Pilot Rock and the high elevations of Porcupine Mtn and Green Mtn. This high-altitude terrain is dotted with vital water sources, including Dollarhide Spring, Powder Springs, and McAllister Spring, which supported travel through the Toll Road Gap. Along the southern border, the map marks the transition into the Klamath National Forest at the Oregon-California state line. The intricate network of Forest Service roads, such as Baldy Creek Rd and Tyler Creek Rd, provides detail on the accessibility of the remote drainages like Bear Gulch and Miller Gulch.