Seitz Canyon is one of the major canyons and valleys within the Ruby Mountains of Elko County, in the northeastern section of the state of Nevada in the western United States. Approximately 5.5 miles (8.9 km) in length, it was extensively sculptured by glaciers in previous ice ages. Remote, scenic, and ecologically diverse, it is protected in both the Ruby Mountains Wilderness Area and the Seitz-Echo Research Natural Area.