Cold Lakes are a pair of glacial tarns in the Ruby Mountains, in Elko County in the northeastern part of the state of Nevada. They are located at the head of Cold Creek Canyon, at approximately 40.715°N, -115.30167°W, and at an elevation of 9880 ft. They have a combined area of approximately 7.4 acre, and a depth of up to 28 ft. The outflow of these lakes are one of the sources for Cold Creek, which after exiting the mountains flows down Lamoille Valley, through the small Lake Phyllis reservoir, and then merges with the main branch of the Humboldt River.