The Aishihik River is a right tributary of Dezadeash River in the Yukon Territory in Canada.
The river forms the outflow of Aishihik Lake. He drained it to its southern end, and then flows through the elongated Canyon Lake. Then he overcomes the Otter Falls, a waterfall that was pictured on the back of the Canadian five - dollar bills in 1954. The river takes later on the right tributary of West Aishihik River and empties into the River Dezadeash. Just before the confluence with Canyon Creek crosses the Yukon Highway 1 (Alaska Highway) the river. Here is still one of the original wooden bridges of the Alaska Highway. The northern section of the river of the Aishihik River including the Otter Falls is taken for power generation so that its water supply is significantly reduced water.