The Adventures of Junior and Spike the Wonder Dog. Book Twelve: Tubing

The family goes to the Purple Pantry restaurant for breakfast, before proceeding to the Gila River to go tubing, where they see an antelope, mountain goat and mountain lion. Spike and Dad rescue two capsized canoeists, before the family continues tubing down the river. While tubing, Dad tells the story about a boy and his dog that help ferry people across the Missouri River on a raft during 1800s.