Mount Clay is a peak located in Thompson and Meserve's Purchase in Coos County in the Presidential Range of the White Mountains of New Hampshire. It is a rise about 0.9-mile (1.4 km) long and a few hundred feet tall, with summit elevation of 5,533 feet (1,686 m); it lies on the ridge joining the summits of Mount Washington, about 0.9-mile (1.4 km) to the south-southeast, with that of Mount Jefferson, about 1.3-mile (2.1 km) north.