Visit Robbers Cave State Park for the annual Cardboard Boat Race at Lake Carlton. Come cheer on handmade cardboard creations as they sail in competition for 1st, 2nd and 3rd place awards in three age categories: 12 & under, 13-17 and 18 & over. There will also be awards for Best Design and the "Titanic Award." A complimentary hot dog lunch will be served at noon, so you'll want to bring your appetite. Whether you come as a competitor or spectator, you won't want to miss this fun and unique event at beautiful Robbers Cave State Park in southeastern Oklahoma.