2021 Map of Graven Ridge

About this map

Modoc National Forest territory dominates this high-country landscape, where complex water management systems define the local geography. Significant catchment features like Graven Reservoir, Clarks Reservoir, and Bayley Reservoir are strategically positioned to capture seasonal runoff from the surrounding uplands. The terrain is marked by distinctive formations such as Graven Ridge and the Portuguese Ridge to the west, separated by drainages like Canyon Cr and the S Fork Canyon Cr. This network of springs—including Lundsford Spring, Arnett Spring, and Big John Spring—indicates the vital role of groundwater in sustaining both the ecology and the local ranching or forestry infrastructure of this Modoc County region. The residential and access patterns are clustered along named corridors like California Pines Blvd, which contrast with the open expanses of Rocky Prairie and Rye Grass Swale.