Griswold Lake is a glacial tarn in the Ruby Mountains of Elko County, Nevada, United States. It is within the Ruby Mountains Ranger District of the Humboldt-Toiyabe National Forest. The lake is located at the head of Hennen Canyon, at approximately 40.635°N, -115.48667°W, and at an elevation of 9222 ft. It has an area of approximately 17 acre, and a depth of up to 20 ft. Griswold Lake is the principal source of Butterfield Creek, which flows down Hennen Canyon before exiting the mountains into Pleasant Valley. The lake is named after Chauncy "Chan" Griswold, an early rancher in Pleasant Valley and the father of Nevada Governor Morley Griswold. Butterfield Creek was also named after an early rancher, Henry Butterfield.