North Furlong Lake is a glacial tarn in the Ruby Mountains, in Elko County in the northeastern part of the state of Nevada. It is located at the head of North Furlong Canyon at approximately (40°33.4′N115°24.8′W), and at an elevation of 9590 feet (2920 meters). It has an area of approximately 16 acres (6.5 hectares), and a depth of up to 20 feet (6 meters).