Fly Fishing Twin Bridges, Montana: Four Rivers, Spring Creeks and Local Pros
Location Details / Montana / Towns / Twin Bridges
Fly Fishing Twin Bridges, Montana: Four Rivers, Spring Creeks and Local Pros
Twin Bridges is where the Big Hole, Beaverhead and Ruby rivers meet to form the Jefferson, with spring creeks all around. Fish the Big Hole for June stoneflies, the Beaverhead tailwater and spring creeks for mayflies through August, and swing streamers for fall browns. Fly into Butte (BTM).
Twin Bridges is a town of a few hundred people with four trout rivers in reach. John Radle, who works with Bauer reels and Winston rods in Twin Bridges, explained the area on our episode published October 4, 2024, and his framework runs through this whole page. Our Big Hole River page covers the freestone in depth; the state picture is at Fly Fishing Montana.
Top species
Brown and rainbow trout; mountain whitefish; Arctic grayling on the upper Big Hole
Best months
Mid-June for the Big Hole; June to August on the Beaverhead and spring creeks; fall for browns
Top nearby waters
Big Hole, Beaverhead, Ruby and Jefferson rivers; local spring creeks
License and regs
Montana FWP 2026 fishing regulations; nonresidents need a Conservation License, a fishing license and an AIS Prevention Pass
Nearest airport
Butte (BTM)
Closures
FWP waterbody closures: check the morning you drive
Rivers and Lakes Near Twin Bridges
- Big Hole River: The freestone, fished as classic drift-boat water with 5- and 6-weights and a 7-weight streamer rod aboard. Its hatches run skwalas, salmonflies, golden stones and yellow sallies before the mayflies. Below Dickie Bridge it is open April 1 to September 30, catch-and-release only. More on our Big Hole page.
- Beaverhead River: A reservoir-fed tailwater from Clark Canyon Dam that holds cool water into August. FWP rules: rainbows are catch-and-release on the entire river, browns are catch-and-release from the dam to High Bridge and below Barretts Diversion, and nonresidents may not float High Bridge to Henneberry on Saturdays from the third Saturday in May through Labor Day.
- Ruby River: The smallest of the three. Below Alder Bridge FWP allows one brown under 18 inches; from Ruby Dam to Alder Bridge browns are catch-and-release and the season runs April 1 through September 30.
- Jefferson River: Formed at Twin Bridges and flowing on toward the Missouri headwaters. FWP allows 3 combined trout, only 1 over 18 inches and only 1 rainbow.
- Spring creeks: Aquifer-fed, steady in temperature and flow, and mayfly water. Many are private and booked through outfitters; Montana's stream access law lets public anglers walk between the ordinary high-water marks, so boot miles and map research find the rest.
When to Fish Near Twin Bridges
Radle sorts the water by hatch architecture: the Big Hole runs a stonefly progression, while the Beaverhead and spring creeks run on mayflies, with PMDs from mid-to-late June through July and terrestrials after. The chart is our reading of that framework, not agency data.
| Target | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Skwala (Big Hole) | ||||||||||||
| Salmonfly and golden stone (Big Hole) | ||||||||||||
| PMD (Beaverhead and spring creeks) | ||||||||||||
| Terrestrials | ||||||||||||
| Streamers for staging browns |
Intensity:LightModerateHeavy
In a weak-snowpack year, Radle's advice is to leave the warm Big Hole alone and shift to the Beaverhead and the spring creeks, which fish well deep into August. Read Hot Water, Hoot-Owl Closures, and When to Stop Fishing before you book midsummer.
From the Podcast: John Radle on a Spring Creek Brown
Radle's spring creek method is the opposite of covering water: walk slowly, tread lightly and stay locked on what is ahead, because these fish sit in cut banks and overhanging grass much closer than you expect. On a single feeding fish, stay back, cast to the side it feeds toward, work closer, and only then change flies. His example: a brown refused a size 16 parachute hopper twice, got ten minutes of rest, and ate a small foam ant on a 12-and-a-half-foot 4X leader. Hear it in Bauer Reels: Get to Know the Angler and read the tactics in Swinging Streamers with a Two-Hander.
Hire a Local Pro in Twin Bridges
No Twin Bridges guide, lodge or outfitter is in the FFIP Certified directory yet, so we won't name one we haven't vetted. Many of the area's spring creeks are reached through outfitters that hold access. Find a Pro lists every pro we stand behind, and Frontiers International Travel can plan a full Montana lodge trip.
Tips from Podcast Guests
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Target staging fall browns with a two-handed jig-swing
Strip with the off hand to jump the fly up and let it fall; staging browns hit it on the drop. Check the regs first: some reaches close after September 30.
A Montana guide based in Twin Bridges, on the Fly Fishing Insider Podcast
Browse every tip in the Fly Fishing Tips Library.
Nearby Fly Fishing Towns
See every base on our Best Fly Fishing Towns in Montana page.
Twin Bridges Fly Fishing Questions, Answered
Where can you fly fish near Twin Bridges?
The Big Hole, Beaverhead and Ruby rivers meet at Twin Bridges to form the Jefferson, so four rivers start in town. The Big Hole is the freestone, the Beaverhead a reservoir-fed tailwater, and the Ruby a smaller river, with spring creeks throughout the valley. Many spring creeks are private and booked through outfitters.
When is the best time to fly fish near Twin Bridges?
Mid-June for the Big Hole's salmonflies and golden stones, June through August for PMDs on the Beaverhead and spring creeks, and September and October for streamers to staging browns. Mind the closures: the lower Big Hole and parts of the Beaverhead and Ruby close after September 30.
What should you fish near Twin Bridges in a low-snow year?
Shift rather than cancel. John Radle's advice is to leave the Big Hole alone once it warms and fish the reservoir-fed Beaverhead and the aquifer-fed spring creeks, which hold their temperature and flows regardless of snowpack and fish well deep into August.
Is Twin Bridges or Dillon a better base?
Choose Twin Bridges to sit at the confluence with equal reach to the Big Hole, Beaverhead, Ruby and Jefferson. Choose Dillon to be closest to the upper Beaverhead below Clark Canyon Dam, with more services in town. The two are close enough to fish the same water from either.
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Tight lines, everyone!
By Christian Bacasa, host of the Fly Fishing Insider Podcast. Last reviewed November 2026.
Seasons, regulations, closures and license requirements change, sometimes mid-season. Rules here come from Montana FWP's 2026 regulations or Yellowstone National Park at the time of writing. Confirm current rules with the agency, and availability with your Frontiers specialist, before you book anything.
Sources: Big Hole, Beaverhead, Ruby and Jefferson rules: Montana FWP 2026 Fishing Regulations. Closures: FWP waterbody closures. Hatch architecture, drought strategy and spring creek tactics: John Radle on the Fly Fishing Insider Podcast.