According to the United States Census Bureau, the town has a total area of 26.6 square miles (69.0 km²), of which, 26.4 square miles (68.3 km²) of it is land and 0.2 square miles (0.6 km²) of it (0.94%) is water [REF].
The western border of the town is formed by the Genesee River and the Genesee River Gorge.