Grayling are native in cold-water regions of the Northern hemisphere. In North America, their native range was across northern Canada with southern extensions into Michigan and the upper Missouri Drainage above the falls. Grayling, a Wyoming native, have been introduced into a number of high lakes in Wyoming. Though they are a cold-water species, grayling generally do best in relatively shallow high lakes with more moderate summer water temperatures and longer growing seasons than those found in many alpine lakes.
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