The Zumwalt Prairie is the largest remaining areas of Pacific Northwest bunchgrass prairie in North America. These grasslands once covered a vast area west of the Rocky Mountains, and included portions of southern British Columbia and Alberta, eastern Oregon and Washington, Northern Idaho, and Western Montana. Located in in Wallowa County in northeast Oregon, this grassland once covered approximately 300,000 acres (130,000 ha) of which approximately 20% has since been converted to crop agriculture. Once part of the homeland of the Joseph Band of the Nez Perce people, this area now is used for growing wheat and as spring, summer, and fall range for beef cattle. Despite centuries of human use, the Zumwalt Prairie continues to provide a home for virtually all the plants and animals that have survived here for millennia and supports the largest known population of Spalding’s catchfly (Silene spaldingii). -

See more at: https://www.conservationgateway.org/ConservationByGeography/NorthAmerica/UnitedStates/oregon/grasslands/zumwalt/Pages/default.aspx#sthash.Hh8ml77p.dpuf