This is the most comprehensive guide to flyfishing Montana, and the only guide to address the increasing threat of whirling disease (the perception is much worse than the fishing). Dividing the state into five sections, the important rivers, tributary streams, spring creeks, and stillwaters are covered in each. Detailed site-specific maps show river mileage, access points, and campground information. Major rivers covered include the Big Hole, Beaverhead, Missouri, Madison, Yellowstone, Clark Fork, Bitterroot, and Bighorn. Lesser-known waters, like the Hog Hole (really!), Metcalf Lake (trophy rainbows), and Rattlesnake Creek (large native cutthroats) are also described. Having consulted local guides and experts, Thomas covers the flyfishing gear, technique, peak seasons, and fly patterns that ensure a successful trip in Big Sky Country.