1969 Map of Arco Pass

About this map

The Lost River Range dominates this late-1960s topographic study, where the high-altitude terrain of the Challis National Forest meets the northern extent of the Little Lost River Valley. The mapping focuses on a network of steep drainages, including Cedarville Canyon and Taylor Canyon, that descend from the peaks toward the valley floor. A strategic crossing is marked at Arco Pass, where a Jeep Trail provides the primary means of navigating the rugged corridor between the ranges. This map captures the region’s character as a managed wilderness, defined by its water sources such as Hurst Creek and numerous unnamed springs. The distribution of these springs and the intricate systems of Horsethief Canyon and Corral Canyon illustrate the land's reliance on seasonal runoff and localized hydrology in this corner of Butte County.