2017 Map of Poison Creek

About this map

The Silvies River and its complex network of seasonal waterways define this portion of Harney County, where the high desert terrain transitions into a landscape of managed water and volcanic landmarks. Historically significant water sources like Coal Pit Spring, Black Spring, and Theimer Spring are interspersed throughout the higher elevations, including the prominent Mahogany Ridge. The southern portion of the map reveals a shift toward wetlands and irrigation, evidenced by Fivemile Slough, Foley Slough, and the Paiute Reservoir. These features, alongside Arntz Reservoir, suggest a long-standing reliance on water management for ranching and agriculture in an otherwise arid environment. Evidence of local industry and infrastructure is found at 5 Mile Pit and along established routes such as Silvies River Rd and Curry Garden Rd, while Arrowhead Butte stands as a distinct topographical marker in the valley floor.