Umatilla National Forest, located in the Blue Mountains of southeast Washington and northeast Oregon, covers 1.4 million acres of diverse landscapes and plant communities. The Forest has some mountainous terrain, but most of the area consists of v-shaped valleys separated by narrow ridges or plateaus. The landscape includes heavily timbered slopes, grassland ridges and benches, and bold basalt outcroppings with elevations from 1,600 to 8,000 feet above sea level. Summers are generally warm and dry with cool evenings. Cold, snowy winters and mild temperatures during spring and fall can be expected.