Stop by Big Spring, Round Spring or Alley Spring Ranger Stations to pick up your official Missouri National Parks Passport Challenge booklet. You can also stamp your official Ozark National Scenic Riverways passport logo at the Ranger Stations. Set out on a journey to visit all six unique Missouri National Parks. Participants that display stamps from 3 different Missouri National Parks recieve a free souvenir water bottle. Those participants that display stamps from all 6 Missouri National Parks recieve a free souviner commemorative drawstring backpack. The Passport Challenge ends on December 31st, 2017 so get those stamps collected and experience your Missouri National Parks. To learn more about the Missouri National Parks Passport Challenge.