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 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 to a height of 11,387 feet.