Come to beautiful Tenkiller State Park for the park's annual Halloween Celebration. This spooktacular state park event will feature a Halloween costume contest, pumpkin carving, campsite and cabin decorating contests and more. Pumpkins are available on a first-come, first-serve basis, or you can bring your own. Whether this event is part of your family tradition, or it's your first time to experience it, you'll want to bring the whole family out for this fun Halloween event at Tenkiller State Park.