Loading map...

2021 Map of Ambrose Valley

Name: 2021 Topographic Map of Ambrose Valley
Creator: U.S. Geological Survey
Published: 2021
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2021

About this map

Modoc National Forest territory spans this high-elevation landscape along the border of Modoc and Lassen counties. The terrain is defined by a series of parallel ridges and deep drainages, including Dee Spring Ridge and Mid Ridge, which separate various springs and canyons. Important water sources like Big Pine Spring, Yellow Jacket Spring, and Stump Spring are scattered throughout the slopes, indicating the critical nature of these points for livestock and wildlife in the arid interior.

The central basin of Ambrose Valley gives way to Ambrose Canyon, while the Red Tail Rim Trl provides a continuous north-south path through the forest. To the south, the landscape opens toward Long Hill and the wide expanse of Ash Valley. This 2021 survey by the U.S. Geological Survey documents the modern configuration of forest service roads, including the prominent Ash Valley Rd, as they navigate the canyons of Messenger Gulch and Rivalier Canyon.