Thunder Ridge is a small ski area located in Patterson, NY. Because it is located just 75 minutes from New York City, the mountain attracts skiers and snowboarders from across the New York area. While it does not receive a lot of snowfall, Thunder Ridge does have snowmaking capabilities which can cover 95% of the mountain. Because it is open at night, Thunder Ridge is a haven for high schoolski racing. The mountain hosts part of Hudson Valley League racing.
Under previous ownership the mountain was known as Birch Hill (1957–1968) and Big Birch (1968–1995).