Mark Twain Lake Jellystone Park is the place for family fun! Enjoy our large waterpark with a 500,000-gallon wave pool, lazy river run, and space bowl during your stay with us. New in 2021- Laser Tag, Jumping Pillow, and Water Wars. Themed event weekends and daily activities for the whole family. Close to historic Hannibal Mo and minutes from Mark Twain Lake National Forest, this is the perfect place for your camping fun. Visit the Ranger Station for all your needs, including the cafe, souvenirs, camping supplies, and gasoline.