Harrison Lake is a man-made reservoir located about 45 minutes from Bozeman and Ennis. The lake collects the waters of the North and South Forks of Willow Creek as they pour out of the Tobacco Root Mountains. Best fished from a boat, Harrison Lake contains large Rainbow Trout that average 17"-19". The trout here are known as hard fighters and often produce sizzling runs. Harrison Lake does not get a consistent "gulper" hatch like Ennis Lake and Hebgen Lake do, but sporadic hatches do bring trout to the surface at times. The best flies are typically leach patterns, damselfly nymphs, and calibeatis nymphs. A sinking line or sink tip line is useful for fishing Harrison.
For a guided trip on Ennis Lake contact Montana Angler Fly Fishing