The William C. Whitney Wilderness Area, an Adirondack Park unit of New York's Forest Preserve, is located in the town of Long Lake, Hamilton County.

The area contains 12 bodies of water covering 4,286 acres (17.34 km2) and 20 miles (32 km) of foot trails.

The area is named for William C. Whitney, who was an American political leader and financier.

This area also includes twelve smaller water bodies, a short section of the Beaver River, pond and lake outlets and numerous other small streams and flows.

It also contains an extensive network of old logging roads which provide prime cross-country skiing trails.