Ruby Dome is the highest mountain in both the Ruby Mountains and Elko County, in Nevada, United States. It is the twenty-seventh-highest mountain in the state, and also ranks as the thirteenth-most topographically prominent peak in the state. The peak is located about 21 miles (34 km) southeast of the city of Elko within the Ruby Mountains Ranger District of the Humboldt-Toiyabe National Forest. The mountain rises from a base elevation of about 6,000 feet (1,800 m) to a height of 11,387 feet (3,471 m). It is the highest mountain for over 90 miles in all directions.