Stillwater Lake is a reservoir that covers approximately 315 acres (1.27 km²). The lake is located in Pocono Summit, Pennsylvania at an elevation of 1,811 feet (552 m). Fed by Dotter's Run, Hawkeye Run, Pocono Summit Creek, and several underground springs, the lake flows out to Lake Naomi via Tunkhannock Creek. There are several Tunkhannock Creeks in the Poconos. This one merges with the Tobyhanna at Pocono Lake.