The Gardner River (also known as the Gardiner River) is a tributary of the Yellowstone River, is entirely located within Yellowstone National Park. The river rises in the northern part of the park and winds southeast until it reaches Gardner’s Hole and meets with other small tributaries.
Higher up the river the fish are quite small, however as the river makes its way through the Mammoth-Gardner area the fishing is plentiful and the fish are much larger.
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