1972 Map of Sumpter

Beyond the valley floor, the terrain rises into the Whitman National Forest, marked by peaks like Huckleberry Mountain. Evidence of early 20th-century transportation is preserved through the Old Railroad Grade, which winds toward the high-altitude Juniper Flat. Genealogists and local historians will find value in the location of the Blue Mtn Cem and numerous named water sources such as Antelope Spring and Metsker Spring, which often mark the sites of early homesteads or campsites.