river runner

Short definition from Wiktionary

Noun

1. 1
   A raft, kayak, or similar watercraft used especially for traveling with the current of a river in a swift manner.
2. 2
   A person who uses such a watercraft.
3. 3
   A recreational or commercial boat used for regular operation on a riverway.
4. 4
   A person who is an experienced worker or traveler on a riverway.
5. 5
   Alternative form of river runner.