Hebgen Lake

Hebgen Lake west of West Yellowstone is Montana's finest trophy stillwater fishery and the setting for one of the most famous natural events in American fly fishing — the annual Salmonfly hatch that fills the air above the lake's western arms with massive Pteronarcys stoneflies each spring. The lake impounds the Madison River before it continues south into Yellowstone National Park, and the combination of Madison River genetics and the lake's productive deep-water environment creates exceptionally large brown and rainbow trout. The Hebgen Lake brown trout are among the largest and most beautiful in Montana — wild fish averaging 18–22 inches throughout the season, with trophy specimens over 26 inches encountered regularly by experienced stillwater anglers. These are not merely large fish but exceptionally conditioned fish, their bodies heavy with the scuds, leeches, and minnows that fuel remarkable growth rates in the nutrient-rich lake environment. The Salmonfly emergence in late May and early June is Hebgen Lake's most spectacular event. As the massive stoneflies hatch from the Madison River's tributaries flowing into the lake's western arms, they form dense clouds above the water and trigger the most aggressive surface feeding of the year from both browns and rainbows. Float tubers who position themselves near the mouth of Grayling Creek or Duck Creek during the hatch encounter some of the most exciting dry fly fishing available on any Montana stillwater. The 1959 Hebgen Lake Earthquake (7.5 magnitude) created massive underwater landslides that permanently altered the lake's bottom topography and created the deep structural complexity that now provides excellent trout habitat throughout the season.