2020 Map of Big Rock Flat

About this map

Umatilla National Forest covers much of this high-plateau landscape in Morrow County, where a complex system of timber roads and canyons defines the drainage toward the Columbia River basin. The area is characterized by numerous seasonal and year-round water sources such as Opal Spring and Hollywood Spring, which were historically vital for livestock and forestry operations. High points like Opal Butte and Barlow Butte provide landmarks above the deep incisions of Rough Canyon and Davidson Canyon. The map reveals a land managed for its natural resources, evidenced by the network of Forest Development Roads and the presence of the Rough Canyon Reservoir. Large, relatively level areas like Big Rock Flat and Snowshoe Flat interrupt the series of ridges and hollows, including Pine Hollow and Hothole Ridge, offering a clear view of the topographic character of the Blue Mountains' western reaches.