When do salmonflies hatch on Montana’s Boulder River? How exactly does Wyoming’s stream access law work? What is Whitefish Ed? When should I plan a trip into the Wind River Range? This 8.5x11, 290-page compendium of fly-fishing writer Joshua Bergan’s work from 2006-2021 answers those questions and more, alongside all-new original content. This is the perfect supplement to the where-to guidebooks, and it provides a fresh look at fishing in Montana and Wyoming (even a little about Idaho). Tributary is a quick and easy read riddled with sharp, vivid imagery that portrays the beauty of fly-fishing. It aims to be a more nuanced look at details of our beloved art-sport-hobby-pastime, that goes beyond the usual topics and discussions. It fills in the details on where-to, how-to, when-to, and why-to that guidebooks aren’t designed to cover. Says Bergan: "It’s acting on the awareness that we all have a limited number of days in this often-difficult existence, so we should spend as many of them as we can in ways that keep us elevated." Once you’ve read the guidebooks, you’re ready for Tributary.