Tallman Mountain State Park is a 687-acre (2.78 km2) state park in Rockland County, New York,[2] located adjacent to the Hudson River in the Town of Orangetown just south of Piermont.

[5] Tallman Mountain State Park was formed in 1928 after the Palisades Interstate Park Commission moved to condemn the 164-acre (0.66 km2) property of a quarry operator in an effort to preserve a portion of the Hudson River Palisades.

Park facilities were improved in 1933 by Temporary Emergency Relief Administration workers, who constructed a swimming pool, recreation fields, and picnic areas.

[3] Tallman Mountain State Park is a day-use only park containing five miles (8 km) of hiking trails, including sections of the Long Path and the Tallman Mountain Bike Path.

[5] The park also offers a running track, tennis courts, playing fields, cross-country skiing, and picnic areas.