Home » Facts Home to the Largest New York State Park The Largest New York State Park is Allegany State Park which is the 3rd largest in the nation with 65,000 acres (97 square miles) and lots of trails. Allegany State Park has over 35 miles of Cross Country skiing trails, 18 hiking trails and 5.6 miles of paved multi-use trails (horseback riding, snowmobiling and more) around Red House Lake area. 3 campground areas with over 375 cabins. in Autumn Spring Summer Winter Beaches Bicycling Birding Cabins & Cottages Caves & Caverns Dog-Sledding Environmental Centers Public Campgrounds Hiking Rustic Camping Covered Bridges State Parks Kayaking & Canoeing Skiing Cross Country Snowmobiling Tobogganing Nature Email this page Travel Guide It's a full 56-page comprehensive guide, highlighting the activities and attractions in our County and it's FREE!! View the visitor's guide online or request that the Enchanted Mountains guide be snail mailed to you for FREE! Related Events 2018 Southern Tier Corporate Challenge First Day Hike in Allegany State Park 2018 2018 Sportsman's Show at Seneca Allegany Events Center Olean Theatre Workshop presents "Blithe Spirit" Olean Theatre Workshop presents "Motherhood Out Loud"