Concrete canoe

Coed sprint race at 2008 National Concrete Canoe Competition in Montreal, Quebec

A concrete canoe is a canoe made of concrete, typically created for an engineering competition.

In spirit, the event is similar to that of a cardboard boat race—make the seemingly unfloatable float. However, since concrete and other poured surfaces are an integral part of a civil engineer's education, concrete canoes typically feature more development than cardboard boats.