The term 'River Runner' can be defined as someone who navigates a river in a CANOE. Canoeing is a popular recreational activity that involves paddling a small boat with a single-bladed paddle. It is often used for fishing, camping, or sightseeing. Canoeing is also a competitive sport, with races held on rivers and lakes around the world. River runners must have strong navigational skills and knowledge of the river's currents and obstacles.