In order to survey the Rocky Mountains & Great Plains, the rubber raft was created & took its maiden voyage on the Platte River in 1842. White water rafting didn’t become popular until the 1960s & became an Olympic sport in 1972. Whether you paddle through Class 5 rapids, or just take a lazy float, rafting is a delightful way to spend a summer day. Size: 4.25 X 2 X 0.5