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The Madison River in Yellowstone is formed by the confluence of the Firehole and the Gibbon rivers at Madison Junction. It flows west through a broad, flat valley before exiting the park near the town of West Yellowstone.

The park section of the Madison is a large, clear river holding brown and rainbow trout. It is a catch-and-release only fishery, and the trout are large and wild. The river is best fished in the early morning and evening, when the hatches are most active.

The Madison River in Yellowstone NP — Montana fly fishing

Montana fly fishing — Yellowstone National Park

Local fishing details near West Yellowstone

West Yellowstone is one of the great fly-fishing destinations in North America—a gateway town where the Madison River, Yellowstone Park waters, Hebgen Lake, and dozens of mountain streams converge within easy reach of a single base camp. The Madison River, flowing north from its origin at the confluence of the Firehole and Gibbon Rivers inside Yellowstone, is one of the most celebrated trout rivers in the world and runs just minutes from town. Hebgen Lake, a 12-mile-long reservoir on the Madison, offers outstanding stillwater fishing for brown and rainbow trout. Inside Yellowstone, the Firehole River, Gibbon River, and Madison River provide fishing in a setting of erupting geysers and steaming thermal features found nowhere else on earth. With FWP fishing access and 10 lakes within 30 miles, West Yellowstone puts world-class water at your doorstep. For Montana's fly fishing heritage and river guides, see our Fly Fishing Guide and Rivers Deep Dive. For the full city profile, see our West Yellowstone guide.

At a Glance

  • 10 lakes within 30 miles
  • FWP fishing access within 30 miles
  • Primary species: Rainbow trout, brown trout, Yellowstone cutthroat trout, mountain whitefish
  • Signature fishery: Madison River—world-class dry-fly and nymph water minutes from town
  • Major stillwater: Hebgen Lake—12-mile reservoir with trophy brown trout
  • Park waters: Firehole River, Gibbon River, Madison River (inside Yellowstone)
  • 2 major rivers: Madison River, Yellowstone River (via park)
  • License required: Montana fishing license outside the park; Yellowstone Park fishing permit inside the park (available at fwp.mt.gov and park visitor centers)

The Madison River

Below Hebgen Dam to Ennis

The Madison River below Hebgen Dam is, by any measure, one of the finest trout rivers in the United States. The tailwater section immediately below the dam runs through the Madison Arm and into a broad valley of riffles, runs, and pools that hold extraordinary populations of rainbow and brown trout in the 14- to 20-inch range, with fish over 20 inches taken regularly throughout the season. The river's consistent cold flows from Hebgen Lake create ideal trout habitat—prolific aquatic insect populations produce hatches of salmonflies, golden stoneflies, caddis, pale morning duns, and blue-winged olives that make this classic dry-fly water from late May through November.

Wade fishing is productive throughout the upper Madison, with easy access from Highway 287 and numerous pullouts along the river corridor. Float fishing by drift boat or raft covers more water and accesses runs that wade anglers cannot reach. The famous salmonfly hatch in late June and early July is the signature event—giant stoneflies blanketing the river, bringing the biggest trout to the surface for size-4 dry flies. The hatch moves upstream over several weeks, and following the front is a time-honored tradition among Madison River anglers.

Inside Yellowstone National Park

The Madison River originates at Madison Junction inside Yellowstone, where the Firehole and Gibbon Rivers merge. The park stretch of the Madison flows through broad, wildlife-rich meadows where bison graze along the banks and elk bed in the riverside grass. Fishing here requires a Yellowstone National Park fishing permit (no Montana state license needed inside the park). The Madison inside the park holds rainbow trout, brown trout, and mountain whitefish in a setting unlike any other fishery on earth.

The Firehole River

The Firehole River—flowing through Yellowstone's Upper, Midway, and Lower Geyser Basins—is one of the most unique fisheries in the world. You cast to rising trout while geysers erupt and steam vents hiss in the background. The Firehole's geothermally heated water keeps it warmer than surrounding streams, producing early-season hatches that start weeks before other park waters. Brown trout, rainbow trout, and brook trout inhabit the Firehole, with fish feeding on prolific hatches of mayflies and caddis. The river can become too warm for trout by mid-July in hot summers, pushing the best fishing to June and September–October. The Firehole is accessed from the park road south of Madison Junction, approximately 10–16 miles from West Yellowstone via the West Entrance.

Hebgen Lake

Hebgen Lake, a 12-mile-long reservoir on the Madison River northwest of West Yellowstone, is one of Montana's premier stillwater trout fisheries. The lake holds large brown trout—fish over 5 pounds are not uncommon, and trophy browns exceeding 10 pounds are taken each season—along with healthy populations of rainbow trout and Utah chub. The lake's extensive shallows, weed beds, and tributary inflows create diverse feeding opportunities that grow trout to impressive sizes.

Float-tube and small-boat fishing are the primary methods. The gulper hatch—a late-summer phenomenon when Callibaetis mayflies bring large trout to the surface in shallow bays—is a Hebgen Lake signature event that draws anglers from across the region. The lake's north shore, the Madison Arm, and the Grayling Arm all offer productive fishing with boat access from multiple launch points. Hebgen Lake sits at approximately 6,500 feet and freezes in winter; ice fishing for trout is popular from December through March.

LakeDistance from West Yellowstone
Tweedy Lake5 mi
Duck Creek Pond8 mi
Hebgen Lake12 mi
Cliff Lake23 mi
Leech Lake27 mi
Crag Lake28 mi
Wade Lake30 mi
Little Joe Lake30 mi
Rainbow Lake30 mi
Shooting Star Lake30 mi

The Rivers

Beyond the Madison, several outstanding rivers lie within reach of West Yellowstone. The Gallatin River (30 miles north via Highway 191) runs through the dramatic Gallatin Canyon—fast, bouldery pocket water holding rainbow and brown trout amid the canyon walls. Wade fishing is the primary method; the river's gradient makes most stretches too rough for drift boats. The upper Gallatin inside Yellowstone holds native Yellowstone cutthroat trout in scenic meadow water.

The Yellowstone River is accessible through the park, with the Hayden Valley and Canyon stretches offering native Yellowstone cutthroat trout fishing in a spectacular setting. The Yellowstone Lake tributary streams—particularly Pelican Creek and the Yellowstone River above the lake—provide important native cutthroat habitat, though some waters have seasonal closures to protect spawning fish and bear activity areas.

Fishing Access Sites

West Yellowstone has FWP fishing access within 30 miles. Given the town's small size and the dominance of national park and national forest land, formal FWP access sites are fewer here than in towns on larger river corridors. However, the Madison River's Highway 287 corridor provides numerous informal pullouts and access points, and Hebgen Lake has multiple developed boat launches. Inside Yellowstone, fishing access is managed by the National Park Service and is generally available wherever the road meets fishable water, subject to seasonal closures for wildlife management.

Access SiteDistance from West Yellowstone
Raynolds Pass Fishing Access Site22 mi
Lyons Bridge Fishing Access Site29 mi

Seasonal Guide

Spring (March–May): The Madison below Hebgen Dam fishes well through spring as the tailwater section remains clear even when other rivers run high with snowmelt. Inside Yellowstone, the Firehole River starts fishing earliest—its geothermally heated water produces hatches by mid-April. Most park waters remain closed or snow-locked through May. Hebgen Lake ice-out typically occurs in late April to mid-May, after which the lake begins fishing well for cruising trout in the shallows.

Summer (June–August): Peak season. The salmonfly hatch on the Madison arrives in late June to early July, drawing anglers from around the world. After the salmonflies, golden stoneflies, caddis, and pale morning duns sustain excellent dry-fly fishing through August. Hebgen Lake's gulper hatch peaks in late July and August. The Firehole can become too warm for productive fishing by mid-July—switch to the Gibbon or the Madison inside the park. Yellowstone park waters are open and accessible, but popular stretches see heavy angling pressure during peak Yellowstone visitation.

Fall (September–November): Many experienced anglers consider fall the best season on the Madison. Brown trout become aggressive ahead of their October spawning run, and streamer fishing produces the year's largest fish. Blue-winged olives return on overcast afternoons, and the combination of fall color, reduced crowds, and aggressive fish makes for outstanding conditions. The Firehole River fishes beautifully again as water temperatures cool. The park's West Entrance typically closes to vehicles in early November.

Winter (December–February): The Madison below Hebgen Dam is fishable through winter for dedicated anglers—midges bring trout to the surface on warmer afternoons, and nymphing is productive even in cold conditions. Hebgen Lake offers ice fishing for rainbow and brown trout from December through March. Inside Yellowstone, winter fishing is extremely limited by access (over-snow travel only) and conditions, but the dedicated few who snowmobile or snowcoach to the Firehole find uncrowded, surreal winter fishing in a steaming, snow-covered landscape.

Local Resources

West Yellowstone is a fishing town to its core. Multiple fly shops line Canyon Street, carrying local patterns, providing current hatch reports, and booking guided trips on the Madison, Hebgen Lake, Yellowstone park waters, and the Gallatin. Guide services offer drift-boat and walk-and-wade trips on the Madison, float-tube and boat trips on Hebgen Lake, and guided park fishing excursions that handle permits and logistics. A Montana fishing license is required for waters outside Yellowstone (available online at Montana FWP or at local shops). Inside Yellowstone, a separate Yellowstone National Park fishing permit is required—available at park visitor centers and ranger stations. Catch-and- release regulations apply to many park waters, and specific rules vary by stream; check current regulations before fishing.

For hiking and other outdoor activities near West Yellowstone, see our hiking guide and the weekend itinerary.

Open full West Yellowstone fishing guide →
Hatch calendar & regulations

The Master Hatch Calendar

The insects that govern Montana's rivers follow the sun and the temperature, not the calendar. A cold spring will push every hatch back by two or three weeks. A warm spring will accelerate them. These dates are guidelines, not certainties. A fisherman must learn to read the water and the air, not just the calendar.

Insect Peak Months Key Rivers Recommended Patterns
Midges (Chironomidae) Year-round Missouri, Bighorn, all tailwaters WD-40 #22-26, Griffiths Gnat, Hi-Vis Parachute Midge
Capnia Stonefly January-February Clark Fork, Bitterroot Small dark nymphs
Nemoura Stonefly February-March Clark Fork, Bitterroot Small dark nymphs
Skwala Stonefly February-April Bitterroot, Clark Fork, Gallatin Skwala Adult #8-10, Chubby Chernobyl, Plan B
Blue-Winged Olive (Baetis) March-May, September-November All rivers; best on Missouri, Bitterroot Sparkle Dun #18-22, CDC Dun, RS2 Emerger
Western March Brown March-April Clark Fork, Blackfoot Parachute Adams #14
Mother's Day Caddis April-May Bitterroot, Clark Fork Elk Hair Caddis #14-16
Salmonfly (Pteronarcys) Late May-June Madison, Big Hole, Yellowstone, Gallatin Chernobyl Ant #4-6, Stimulator, Club Sandwich
Green Drake June-July Big Hole, Madison Hi-Vis Extended Body Drake, Trina's Carnage Drake
Golden Stonefly June-July Madison, Big Hole, Yellowstone Stimulator #6-8, Elk Hair Stone, Chubby Chernobyl
Yellow Sally June-July Most freestone rivers Yellow Stimulator #14-16
Pale Morning Dun June-August Missouri, Gallatin, Bitterroot PMD Sparkle Dun #16-18, Comparadun, CDC Emerger
Pale Evening Dun June-August Most freestone rivers Comparadun #16-18
Caddis May-October All rivers Elk Hair Caddis #14-18, Goddard Caddis
Hoppers and Crickets July-September Madison, Yellowstone, Ruby, Big Hole Dave's Hopper #8-10, Fat Albert, Parachute Hopper
Trico July-September Missouri, Madison, Gallatin Trico Spinner #22-26, Two-Wing Spinner
Ants and Beetles June-September All rivers Black Foam Ant #16-20, Beetle #16-18
Spruce Moth August-October Gallatin, Madison, Yellowstone Galloup's Butch Caddis, Elk Hair Caddis #14
Hecuba August-September Big Hole, Beaverhead Hecuba Comparadun #12-14
Mahogany Dun September-October All rivers Comparadun #16, Split Flag
October Caddis September-November Clark Fork, Blackfoot, Bitterroot Elk Hair Caddis #8-10, Stimulator

The Key Hatch Events

The Salmonfly Hatch is the most anticipated event in western fly fishing. The giant stoneflies (Pteronarcys californica) emerge from the Madison, Big Hole, Gallatin, and Yellowstone in late May, moving upriver as water temperatures reach the low 50s F. The hatch is brief, often just two weeks on any given stretch, and it moves upstream at a rate of two to five miles per day. To fish the front of the hatch, you must move with it.

The Skwala Hatch is Montana's first major dry-fly opportunity of the year. It fires on the Bitterroot, Clark Fork, and Gallatin when daytime temperatures warm and water temperatures climb above 40 F, typically late February through April. Trout that have been lethargic all winter aggressively rise to these medium-sized stoneflies.

The PMD Hatch is Montana's most reliable and widespread summer mayfly hatch. PMDs emerge in the mornings on the Missouri, Gallatin, and Bitterroot from June through August, with peak density in July. On the Missouri tailwater, PMD fishing requires long leaders, fine tippet, and an accurate upstream cast to individual rising fish.

Hopper Season is the stuff of legend. Grasshoppers become active along the banks of the Madison, Yellowstone, and Big Hole from July through September. Fish a big foam hopper pattern tight to cut banks, undercut roots, and grassy edges.


2026 Montana Fishing Regulations Summary

All regulations are administered by Montana Fish, Wildlife and Parks (FWP). A fishing license is required for all anglers 12 and older. Regulations change annually; always verify current rules at fwp.mt.gov before fishing.

License Fees (2026)

License Type Resident Nonresident
Annual Fishing License $28 $111
Conservation License (required) $8 $10
2-Day Fishing License N/A $30
10-Day Fishing License N/A $55
Youth Annual (under 15) Free N/A

Standard Season

The standard season for rivers and streams runs from the third Saturday in May through November 30. Many waters have special regulations that differ from the standard season.

Free Fishing Weekends

By Montana law, any person may fish for any fish species without a license on Mother's Day weekend (May 9-10, 2026) and Father's Day weekend (June 20-21, 2026).

Waters Open Year-Round

The following waters are open to fishing year-round under standard regulations unless otherwise noted:

  • Missouri River (all sections)
  • Bighorn River (Fort Smith to Yellowtail Dam)
  • Paradise Valley Spring Creeks (DePuy, Armstrong, Nelson)
  • Most reservoirs and lakes

Special Regulations Waters

Several of Montana's premier rivers have special regulations designed to protect the fishery. These include catch-and-release requirements, artificial lure restrictions, and reduced bag limits. Key examples include:

  • Smith River: Permit required for overnight floats. Permit lottery administered by FWP.
  • Big Hole River: Special regulations to protect the native Arctic Grayling population. Check FWP regulations for current restrictions.
  • Blackfoot River: Artificial lures and flies only in some sections.
  • Missouri River: Catch-and-release only in some sections.

Yellowstone National Park

Fishing in Yellowstone National Park requires a separate YNP fishing permit, available at park visitor centers and ranger stations. Montana fishing licenses are not valid within the park boundaries.


River Conditions and Flow Information

Current river conditions are available through the following resources:

A fisherman must check conditions before driving to a river. The freestone rivers of southwest Montana can blow out overnight after a heavy rain or a warm spell that accelerates snowmelt. A river that was fishing perfectly on Tuesday can be unfishable by Thursday.

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