Tucked away in the southeastern corner of Oregon, over 90 percent of Malheur County is rangeland, with the Bureau of Land Management controlling almost three-quarters of this land. With an economy that is dependent on agriculture, and tourism to a lesser degree, the most intensive farming occurs in the northeastern part of the county in what is known regionally as ?Treasure Valley? (a nickname given to the fertile area fed by the Snake River and its various tributaries, including the Owyhee River and irrigation through the Owyhee River dam). Malheur County is also known for its distinctive volcanic buttes and the striking high-desert canyons carved by the passage of ancient rivers across the landscape. A combined 100,000 acres were listed for sale in Oregon's Malheur County recently; the overall value of all Malheur County land and rural real estate for sale was almost $58 million. Malheur County ranks 25th in the state for the total acreage of land currently advertised for sale. Of all locations in Malheur County with farms, ranches, and rural real estate for sale, Ontario featured the most land for sale. From an economic perspective, government and state-level services contribute most to Malheur County's overall GDP. Malheur County is one of the ten biggest counties in Oregon (9,929 square miles). It's located in the Eastern Oregon region of the state.