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Technically, all upper Columbia and Snake River basin steelhead are summer runs. The anadromous members of the gairdneri subspecies of Oncorhynchus mykiss (redband steelhead) enter the Columbia typically from May through September. The bright coloration is normal for fish that have spent a considerable time in fresh water. It's a long swim to the Wenatchee, Methow, Entiat, Okanogan or Similkameen and fish are often held up even longer in the Columbia when the tributaries remain at a too-high temperature in the latter part of the summer.
 
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