1967 Map of Updegraff Ridge

About this map

The Eel River and its North Fork Eel River confluence define this remote stretch of Northern California along the Trinity and Mendocino County border. The river canyon serves as the primary corridor for the Northwestern Pacific railroad, which snakes along the water's edge past isolated benchmarks and settlements like Ramsey and Spyrock. Much of the southern landscape is occupied by the Round Valley Indian Reservation, characterized by high ridges such as Updegraff Ridge and significant landmarks like Coyote Rock. Historical land use is visible through several ranching operations, including Island Mountain Ranch and Big Bend Ranch, while a network of 4WD tracks provides the only access into the steep, spring-fed drainages like Bell Springs Creek and Willow Creek.