How to use this guide
The Madison runs through several fishing districts with its own access rules, permit system and seasonal restrictions. This guide was checked in October 2026 against Montana Fish, Wildlife & Parks (FWP) and U.S. Geological Survey (USGS) sources listed at the end. FWP posts in-season drought and hoot-owl restrictions that can change week to week — always check fwp.mt.gov before you go.
The River at a Glance
Per the National Park Service and FWP, the Madison River begins at Madison Junction in Yellowstone National Park, where the Firehole and Gibbon rivers meet. It flows about 19 miles through the park before crossing into Montana near West Yellowstone and entering Hebgen Lake. Below Hebgen Dam, the river briefly enters Quake Lake — a lake created by a landslide during the 1959 Hebgen Lake earthquake. From the outlet of Quake Lake down about 50 miles to Ennis Lake, the river is the famous even-grade cobble riffle anglers call the “fifty-mile riffle.” FWP calls this the upper Madison and notes it is one of the state's most heavily used river fisheries. Below Ennis Lake, the river drops through Bear Trap Canyon, an 8-mile wilderness whitewater stretch with Class III–V rapids, then runs about 40 more miles to its confluence with the Jefferson and Gallatin rivers near Three Forks, where the three form the Missouri River. Wikipedia and USGS place the Madison's total length at approximately 183 miles.
A river in three personalities. The upper riffle above Ennis Lake is classic nymph-and-dry trout water. Bear Trap Canyon below Ennis Dam is technical wading and advanced whitewater. The lower river toward Three Forks is slower and warmer, with brown trout and good shoulder-season fishing.
Licenses & the Madison River SRP
2026 Montana fishing license fees (FWP fee schedule)
| License component | Resident | Nonresident |
|---|---|---|
| Conservation license (required for most anglers 12+) | $8.00 | $10.00 |
| Aquatic Invasive Species Prevention Pass (AISPP), ages 16+ | $2.00 | $7.50 |
| Full-season fishing license (Mar. 1 – end of Feb.) | $21.00 | $100.00 |
Per FWP, most anglers 12 and older need a Conservation license plus a base fishing license, and the AIS Prevention Pass is required for anglers 16 and up. Youth 11 and under do not need a license. Prices above are the base resident/nonresident season rates from FWP's 2026 fee schedule; short-term and combination licenses are also available — see fwp.mt.gov/fish/license for the full table.
The Madison River Special Recreation Permit (SRP) Per FWP, a Special Recreation Permit is required for all commercial use, competitive events and organized group activities on the Madison River — and at Madison River FWP and BLM access sites — from the outlet of Quake (Earthquake) Lake downstream to the river's confluence with the Jefferson River. This applies to outfitters, guides and commercial trips, not to individual recreational anglers fishing on their own. FWP also caps the number of guided fishing trips each outfitter may run on the Madison, based on each outfitter's reported usage in 2019 or 2020 (whichever was higher), under Mont. Admin. R. 12.11.6705. If you're booking a guided trip, your outfitter should already hold a current SRP.
This guide does not list stretch-by-stretch angling regulations (seasons, gear restrictions, bag limits). The Madison's rules are set and updated by FWP in the current Montana Fishing Regulations booklet for the region. Always check the current booklet or fwp.mt.gov before you fish.
Flows & Gauges
Two long-running USGS gauges bracket the upper Madison and are the standard references anglers use before a trip.
| USGS gauge | Where | Notes |
|---|---|---|
| 06037500 — Madison River near West Yellowstone, MT | Just below the Yellowstone National Park boundary, upper river | Operated by USGS in cooperation with Yellowstone National Park; continuous discharge data since 1994 |
| 06040000 — Madison River near Cameron, MT | Lower end of the upper Madison, near Ennis | Continuous discharge data since 2011; daily data back to 1951 |
USGS data are provisional and subject to revision.
Practical notes
- Compare today's discharge and water temperature with the past few days — a sharp change signals changing conditions.
- The upper Madison's cobble bottom is uniformly slick; wading boots with good traction and a staff help everywhere, not just in obvious fast water.
- This guide deliberately gives no single “safe” wading flow — your safety depends on your footing, experience and where you choose to wade.
Access Along US-287
Montana's 1985 Stream Access Law lets the public wade and use rivers below the ordinary high-water mark on most streams, including the Madison, regardless of who owns the adjoining land. FWP maintains a chain of Fishing Access Sites (FAS) along US-287 between West Yellowstone and Ennis. A handful of verified sites, downstream to upstream:
| FAS (FWP FishMT records) | Notes |
|---|---|
| Raynolds Pass | On US-287 near the Idaho/Wyoming-side upper river; boat ramp, toilet, primitive camping; 7-day stay limit. |
| Varney Bridge | South of Ennis off Varney Road; concrete ramp, toilet, camping; 7-day stay limit. |
| Ennis | Just southeast of Ennis on Hwy 287; ramp, campsites, drinking water; open seasonally (per FWP, day-use only Dec. 1–Apr. 1). |
| Valley Garden | North of Ennis off Jeffers Road; gravel ramp, toilet, primitive camping. |
| Eight Mile Ford | West of Ennis; gravel ramp, toilet; no camping listed. |
Facility details, fees and seasonal dates change — confirm current status, conservation-license fee and any closures for a specific FAS at FWP's FishMT site lookup before you go.
Private land
Much of the land bordering the river is private. Stream Access Law covers the wetted streambed and the area below the ordinary high-water mark — it does not give a right to cross private land to reach the river. Use designated FAS parking and obey posted boundaries.
Hoot-Owl Restrictions & Closures
FWP uses “hoot-owl” restrictions — a daily time-of-day closure, typically banning fishing from 2 p.m. to midnight — on rivers when drought and heat push water temperatures or flows past criteria set in its administrative rules (ARM 12.5.507–509). FWP may also impose a full 24-hour closure on a stretch if conditions are severe enough. The Madison has carried both hoot-owl restrictions and, in some years, short full closures on specific reaches — for example, warm outflow below Ennis Dam has triggered restrictions in past summers. These are issued and lifted through the fishing season based on real-time water temperature and flow, so any specific dates or river reaches would be out of date by the time you read this.
Always check FWP's current restrictions page before a summer trip — it lists every active hoot-owl restriction and closure statewide, updated through the season.
Resource
FWP Current Waterbody Restrictions: https://fwp.mt.gov/news/current-closures-restrictions/waterbody-closures
Approximate Food & Hatch Chart
Windows below are approximate. They summarize commonly reported patterns on the upper Madison and vary by year, flow and weather. No agency publishes an official hatch chart for the Madison; check a local fly shop or current reports before you plan around a specific hatch.
| Food source | Approx. window | Typical sizes | Notes |
|---|---|---|---|
| Midges / Blue-winged olives | Late winter–spring | #18–24 / #16–22 | Lower-river open water in cold months; overcast days in spring. |
| Mother's Day caddis | Early May | #14–16 | Often reported starting on the lower river first, moving upstream. |
| Salmonfly | Late June–mid July | #4–6 | The signature hatch; commonly reported moving upstream over its run. Timing varies year to year — check current reports. |
| Golden stonefly | Late June–July | #6–10 | Often overlaps the tail of the salmonfly emergence. |
| Pale morning dun (PMD) | Jul–Aug | #14–18 | Reported as a dependable mid-morning/afternoon hatch most summers. |
| Caddis (general) | May–Sep | #14–18 | Evenings and riffle margins through the season. |
| Hopper | Late Jul–Sep | #8–12 | Bank-fishing pattern once grasses dry out. |
| Baetis (fall BWO) | Sep–Oct | #18–22 | Often best on overcast fall days. |
Remember: hatch timing is not a guarantee, and some stretches may carry seasonal or drought-driven restrictions during peak summer — see Section 5 before you plan a trip around the salmonfly hatch.
The Fly Box & Rigging
A starter trout box for the upper Madison's riffle-and-nymph style of fishing.
| Fly | Imitates | Sizes | How to fish it |
|---|---|---|---|
| Pheasant Tail / Hare's Ear | General mayfly nymph | #14–20 | Standard nymph-rig point fly. |
| Rubber-leg stonefly nymph | Salmonfly / golden stone nymph | #4–10 | Deep, bounced along bottom near the bank. |
| Zebra midge | Midge larva/pupa | #18–22 | Dropper in slower, colder water. |
| Large foam stonefly dry | Adult salmonfly / golden stone | #4–10 | Tight to the bank during the hatch. |
| Parachute Adams / PMD | Mayfly duns | #14–18 | During a visible hatch. |
| Elk Hair Caddis | Adult caddis | #14–18 | Evenings and riffle seams. |
| Hopper pattern | Grasshopper | #8–12 | Bank fishing, late summer. |
| Woolly Bugger / streamer | Baitfish / sculpin | #2–8 | Swung or stripped through deeper runs, often productive in off-color water. |
Suggested rigging
- Rod: a 9-foot 5-weight covers most dry-fly and nymph fishing; carry a 6-weight for streamers and windy salmonfly-week conditions.
- Leader: 9 feet, 3X–5X depending on fly size and water clarity.
- The riffle bottom is slick cobble — studded or high-traction wading boots and a wading staff are worth the weight.
- Confirm any district-specific gear rules (e.g., barbless hook requirements, artificial-only water) in the current FWP regulations booklet before you fish.
Live Conditions & Resources
Scan or tap before you drive.
| USGS W. Yellowstone | FWP restrictions | FWP licenses |
|---|
| Resource | Link |
|---|---|
| USGS 06037500 (near West Yellowstone) | https://waterdata.usgs.gov/monitoring-location/USGS-06037500/ |
| USGS 06040000 (near Cameron) | https://waterdata.usgs.gov/monitoring-location/USGS-06040000/ |
| FWP fishing license basics (2026 fees) | https://fwp.mt.gov/fish/license |
| FWP current waterbody restrictions / hoot-owl | https://fwp.mt.gov/news/current-closures-restrictions/waterbody-closures |
| FWP Madison River recreation & SRP info | https://fwp.mt.gov/activities/boating/madison-river |
| FWP Madison River fishing data | https://fwp.mt.gov/fish/anglingData/southwest/madison |
| FWP FishMT (Fishing Access Site lookup) | https://myfwp.mt.gov/fishMT/ |
| Montana current fishing regulations | https://fwp.mt.gov/fish/regulations |
| More free guides | https://learningtoflyfish.com/field-guides |
Safety
Fly fishing and wading involve real risks. These are general precautions, not a guarantee of safety.
- Slick, uniform cobble. The Madison's riffle bottom can be deceptively slippery throughout; never wade beyond your ability, and consider a wading belt and staff.
- Bear Trap Canyon. The whitewater stretch below Ennis Dam requires real boating skill — scout rapids and only float water that matches your experience.
- Heat and water temperature. Montana summers can be hot; warm water stresses trout. Follow any active hoot-owl restriction and handle fish quickly in warm conditions.
- Weather. Afternoon thunderstorms are common in the Rockies — leave the water and get off elevated ground if one approaches; a graphite rod conducts electricity.
- Remote stretches. Tell someone your plan and expected return time, especially near West Yellowstone or in Bear Trap Canyon.
- Emergencies. Call 911. Cell coverage is limited in parts of the Madison Valley and inside Yellowstone National Park.
Sources & Disclaimer
- Montana Fish, Wildlife & Parks (FWP): 2026 license fee schedule and fishing license basics (fwp.mt.gov/fish/license); Madison River recreation and Special Recreation Permit information (fwp.mt.gov/activities/boating/madison-river); Madison River angling data page; current waterbody restrictions / hoot-owl page; FishMT Fishing Access Site records for Raynolds Pass, Varney Bridge, Ennis, Valley Garden and Eight Mile Ford.
- Montana Administrative Rules: ARM 12.11.6705 (Madison River commercial use cap); ARM 12.5.507–509 (angling restriction and closure criteria).
- U.S. Geological Survey: site records and data for gauges 06037500 (near West Yellowstone) and 06040000 (near Cameron).
- National Park Service: Madison River / Madison Junction articles on the river's source and course through Yellowstone National Park.
- Wikipedia (Madison River): used only to cross-check the commonly cited total river length (~183 miles) and mouth location at Three Forks, MT, against NPS and FWP descriptions.
- Hatch and fly information reflects commonly reported patterns and is presented as approximate guidance, not official agency data.
Disclaimer
This guide is provided for general information. It was checked against the sources above in October 2026, and we work to keep it accurate, but errors can occur, and regulations, permits, access, fees, restrictions and river conditions change without notice — sometimes within the same season. Always confirm current rules, closures and hoot-owl status with Montana Fish, Wildlife & Parks, respect private land, and obey posted signs. Fly fishing, boating and wading involve inherent risks — check flows before you go, never wade beyond your ability, and leave the water when storms approach; your safety is your own responsibility. LearningToFlyFish.com is not affiliated with Montana FWP, the USGS or any agency named in this guide. Full disclaimer: learningtoflyfish.com/disclaimer.
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