1969 Map of Arrowrock Reservoir NE

About this map

Boise National Forest encompasses this high-elevation landscape, where the Boise River feeds into the winding northern arms of Arrowrock Reservoir. This 1960s-era survey documents a region defined by steep drainages and recreational infrastructure, notably the Cottonwood Ranger Sta and seasonal camps like Cottonwood Campground and Willow Creek Campground. The topography is dominated by prominent peaks such as Thorn Creek Butte in the northeast and Mt Heinen to the southwest, separated by an intricate network of gulches including Switchback Gulch and Garden Gulch. A Radio Facility sits atop a ridge near the reservoir, while the boundary between Boise and Elmore counties follows the natural course of the water, reflecting the intersection of administrative lines and the physical geography of the Boise River basin.