1990 Map of Steele Swamp

About this map

Grohs Ranch and Steele Swamp Ranch sit within a high-elevation landscape defined by the intersection of the Modoc National Forest and Fremont National Forest. This 1990 provisional survey documents the rugged borderlands where California meets Oregon, marked by a series of state boundary monuments from State Bdy Mon #43 to State Bdy Mon #48. The terrain is characterized by broad seasonal basins and drainages, most notably the Steele Swamp and Fourmile Valley. Water management is evident through features like the Fourmile Reservoir and numerous stock ponds, supporting the ranching operations that have long persisted in this remote corner of Modoc County. The map provides a clear record of the hydrological network, including the headwaters of Boles Creek and the meandering path of Willow Creek as it flows past Bird Spring Ridge.