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 , 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). This is a common camp for users of the Ruby Crest National Recreation Trail, which passes nearby.