The Ottawa Cliffsides were a senior team that played in the Interprovincial League from 1908-1911. They were the first winner of the Allan Cup in 1909 when the cup was given to the winner of the Interprovincial Hockey League. The Cliffsides played for only three seasons in the Interprovincial, They then reappeared in the Ottawa City Senior League in 1919-20 before disappearing for good.