2014 Map of Moores Hollow

About this map

The Snake River carves a critical boundary through this landscape, separating Malheur County, Oregon from Washington County, Idaho. This riverine environment is defined by its agricultural infrastructure, where the Owyhee Canal, Slide Ditch, and Upper Ditch draw water into the surrounding basins. Significant alluvial features like Westlake Island and McRea Island sit within the river's path, while the adjacent Weiser Flat and Lower Dead Ox Flat indicate a long history of floodplain utilization. The small settlements of Annex and Moores Hollow are connected by a network of local roads such as Olds Ferry-Ontario Hwy and Moores Hollow Rd. The terrain is further marked by numerous gulches, including Shepherd Gulch and Coyote Gulch, which channel seasonal runoff toward the river. Local landmarks like Wheel Gulch Basin Spring and Wickiup Springs provide vital water points in an otherwise arid drainage system.