Clackamas County is part of the Chehalem Mountains AVA wine region, which sits on a series of sedimentary ridges that provide diverse soils and growing conditions at slightly higher altitudes than other Willamette Valley vineyards. Some 150 vineyards are located throughout the hilly countryside, comprising three counties—Yamhill, Washington and Clackamas—which frame the southwestern suburbs of the Portland metropolitan area. The value of all land and rural real estate for sale in Clackamas County recently was nearly $434 million, representing a combined 4,376 acres of land for sale in Clackamas County. Clackamas County ranks sixth out of 36 counties in Oregon for the total acreage of land currently advertised for sale. Of all farms, ranches, and rural real estate for sale in Clackamas County, Oregon City had the most land for sale. Clackamas County is Oregon's 19th biggest county (1,882 square miles). It's located in the Portland Metro Oregon region of the state.