GRG guides in a lineup in the river

Our Big Sky, Montana Fly Fishing Guides

We love what we do and want to share our passion with you.

Because of our location in Big Sky, we are a year-round guide service, and our guides work in every month of the year, in all types of weather. This means our fly fishing guides log more days on the water than any other Montana fly fishing guides.

With over a hundred years combined guided experience, our crew works with all abilities of anglers. We love guiding beginners and helping them discover fly fishing. Our expertise allows us to work with experienced anglers, offering them new tips and techniques. We know the waters of Montana and can take experienced anglers to all corners of the state, creating a new brand of fly fishing for these seeking new fishing horizons.

All of our guides are licensed with the state of Montana and trained in First Aid and CPR.

Try our Guide School

GRG offers a guide school that's equal to none. We've been running these classes for over five years now, and many of our graduates work for us.

If you'd like to learn the skills guides need, or just want to improve your fishing, Join us.

Jimmy Armijo

Jmmy Armijo holding a Yellowstone river cutthroat
  • Favorite River: Whichever one I'm fishing at the time - the Madison is high on the list though.
  • Favorite Fly: The Gobnobbler is my favorite fly name, but the Pat's Rubberlegs for a nymph, Bloom's Parachute Caddis for a dry, and a Zuddler for a streamer
  • Favorite place for after-fishing cocktail: The back deck at Gallatin Riverguides, followed by the Gallatin RiverHouse Grill
  • Best fish ever: 26" Brown caught on the Yellowstone River right in downtown Livingston with Aaron and Blake
  • Favorite Place to eat in Montana: Campfire next to any river or the Gallatin RiverHouse Grill and the Cafe at the Inn
  • What I splurge on: Fly tying stuff and sweet gear
  • Other than fishing for GRG, where else he'd rather be: Montana is the place for me, but anywhere fish are hungry and the scenery is beautiful will do

Pat Straub

Pat Straub looking aggressive while gripping a flyrod in his teeth
  • Favorite River: Secret Creeks
  • Favorite Fly: Most folks think the Chubby-Rubby fly combo is my favorite, but it's actually a single Purple Haze in size 16
  • Favorite place for after-fishing cocktail: I could lie to you and list numerous spots, but, anymore, it's a beer on my back deck at home kicking the soccer ball or throwing a baseball with my kids
  • Favorite Steak: El Effe's cut at Stacy's Old Faithful in Gallatin Gateway
  • Best fish ever: My oldest daughter's first Yellowstone Cutthroat trout; Fish with Pat to find out where
  • What I splurge on: Keeping Mama happy, but I have been known to throw money at chasing permit
  • Other than fishing for GRG, where else he'd rather be: With my family floating any river in Montana, but the Gallatin and the Yellowstone are favorites

Bob Merryman

Close up of Bob Merryman's face
  • Favorite River: All of them
  • Favorite Fly: Sculpin
  • Favorite place for after-fishing cocktail: Home
  • Best fish ever: One I caught on a hot summer day

Josh Osborn

Josh Osborn holding a large Steelhead with his dog in the background
  • Favorite River: Gallatin - hands down - and the Kalama River, SW Washington
  • Favorite Fly: Bloom's Caddis
  • Favorite place for after-fishing cocktail: Happy Hour near Hebgen Lake
  • Best fish ever: Monster Gallatin Brown on salmon fly dry and a 39" X 18" summer Steelhead from the Columbia River in Oregon, or a Costa Rican sailfish (credit to Mr. Bob Merriman for making me scale the rock face to get into the hole for that sailfish)

Mike Donaldson

Mike Donaldson showing off a large Brown trout
  • Favorite River: Madison, Yellowstone, Gallatin
  • Favorite Fly: Big streamers or the Slippery Taco
  • Favorite place for after-fishing cocktail: Happy Hour near Hebgen Lake
  • Best fishing memory: Fishing the Hexagenia hach in the middle of the night on the AuSable River with my brother Nick and my Dad when we were little kids
  • Favorite Place to eat in Montana: Breakfast at the Bugaboo Cafe
  • What I splurge on: Flies, Fishing Gear, and Cold Drinks
  • Other than fishing for GRG, where else he'd rather be: Fishing for permit in Belize

Max Anderson

Max Anderson grinning while holding a large Rainbow trout with a river in the background
  • Favorite River: The Yellowstone
  • Favorite Fly: Purple Chubby
  • Favorite place for after-fishing cocktail:The takeout boat launch
  • Best fish ever: Any fish on a streamer
  • Favorite place to eat in Montana: The Edgar Bar
  • What you splurge on: Fly tying materials
  • Other than fishing for GRG, where else he'd rather be: Any river or elk hunting

Aaron Broughton

Aaron Broughton holding a large Brown trout
  • Favorite River: Yellowstone
  • Favorite Fly: Anything with lead eyes
  • Favorite place for after-fishing cocktail: Melrose Bar on the Big Hole
  • Best fish ever: A streamer-eating Brown trout

Austin Trayser

Black and white image of Austin Trayser kneeling in a stream holding a trout for his black labrador to sniff
  • Favorite River: Yellowstone
  • Favorite Fly: Purple Masher
  • Favorite place for after-fishing cocktail: Charlie B's, Missoula
  • Best fish ever: Giant Brown trout from the Gallatin

Shawn Diesel

Shawn Diesel holding a client's big Rainbow trout with the client giving a 'Thumbs UP' sign in the background
  • Favorite River: Slough Creek, Soda Butte, Lamar or maybe the Madison
  • Favorite Fly: Anything with CDC
  • Favorite place for after-fishing cocktail: The Murray in Livingston
  • Favorite place to eat in Montana: Calling in burgers at the Happy Hour Bar on the way home from the Madison at 11pm
  • I splurge on: Flies and other things I tend to lose
  • Other than fishing for GRG, where else he'd rather be: Fishing somewhere, I guess

Blake Majors

Blake Majors with his dog in a driftboat
  • Favorite River: Big Hole or Yellowstone
  • Favorite Fly: Pink Pookie
  • Best fish ever: 42" Redfish in South Texas
  • Favorite place to eat in Montana: Rib and Chop House
  • Other than fishing for GRG, where else he'd rather be: Sitting on a tropical beach having a rum drink after a good day of fishing on the flats

Pat Joyce

Pat Joyce on the water in a driftboat holding up a large Rainbow trout
  • Favorite River: Yellowstone River near Livingston
  • Favorite Fly: Gotta love the Chubby
  • Favorite place for after-fishing cocktail: The Murray in Livingston - Moscow Mule is my drink
  • Best fish ever: Yellowstone two-footer, caught in mid-March - ate a big-ass streamer
  • Best fishing memory: Surf-casting with my Dad off the coast of Cape Cod, then having dinner in Nantucket

Rick Fancher

Rick Fancher sitting on the tailgate of his truck holding a beer and petting his Golden Retriever with fishing gear in the background
  • Favorite River: Missouri, but the Gallatin is my heart and soul
  • Favorite Fly: Purple Haze and Zebra Midge
  • Favorite place for after-fishing cocktail: For the Yellowstone, the Murray Hotel; the Gallatin, the RiverHouse Bar & Grill or Lone Peak Brewery; the Madison, the Happy Hour Bar; on the Missouri, it's Izaak's
  • Best fish ever: 24" Rainbow on the Missouri with a Zebra midge
  • Favorite place to eat in Montana: Breakfast at the Corral
  • What you splurge on: Fishing gear
  • Other than fishing for GRG, where else he'd rather be: Touring the Rocky Mountains with a teardrop camper exploring all the great fishing to be had, or shooting gophers in my back yard

Drew Hay

Drew Hay holding a large Brown trout with a rocky riverbank in the background
  • Favorite River: As long as there is water, good friends, and fish eating, the where isn't the important part
  • Favorite Fly: Something big, flashy, and tasty
  • Favorite place for after-fishing cocktail: You'll find me at Fiesta Mexicana: Big portions, friendly staff, and great prices
  • Best fish ever: You wouldn't believe me anyways
  • Favorite place to eat in Montana: York Bar: Best burgers you can find
  • What you splurge on: I tend to spend all my money on hunting gear and flies
  • Other than fishing for GRG, where else he'd rather be: Chasing Browns or chasing elk

Anne Anderson

Anne Anderson grinning while holding a large Brown trout with a river in the background
  • Favorite River: Missouri and the Maddi are favs, but whatever river I'm casting into is my favorite
  • Favorite Fly: A streamer fan for sure and I love fishing the sex dungeon pattern or any big articulated streamer . . . Mmmmm
  • Favorite place for after-fishing cocktail: The back porch with the pups and fellow fishing buddies of the day
  • Best fish ever: While floating down the Missouri on a calm fall day, a pod of rising fish were in the distance. By this time of the season, the fish are easily spooked by boat or lines, so being very quiet and strategic, I set the anchor in the boat. Slowly I was letting out line and sneaking in as close as possible before they'd spook. Sat there for 10 minutes studying the flies they were eating, then cast perfectly above the sipping monster of the bunch. Couldn't see my fly being taken, but set to the little ripple the water made and...BAM!!: Two-foot rainbow
  • Favorite place to eat in Montana: I love a rare steak, a very rare and bloody piece of meat, and the Oasis in Manhattan knows how to perfectly warm up a piece of angus cow
  • What you splurge on: I wish it was a savings account, but trips! I love to travel to new fishing locations . . . Looking to splurge on a trip to Belize soon!
  • Other than fishing for GRG, where else he'd rather be: I love Montana. It is the perfect place for me. Fishing, skiing, hiking, hunting, hot-springing, and backpacking to mountain-top fish-filled lakes

Shane Stalling

Shane Stalling in a river with his rod tucked under his arm holding a large Rainbow trout in the water
  • Favorite River: The Yellowstone: Every float is different and it is full of good water. If the fishing is slow, the scenery mixed with some beers keeps me smiling
  • Favorite Fly: Parachute Adams, Purple Haze and Elk hair Caddis should all get the job done
  • Favorite place for after-fishing cocktail: It's more of a pre fishing beverage after working in the shop all day. Jump out on the back deck, steal a beer from one of the guides, listen to some fish stories and then go fish once all the trips are off the water
  • Best fish ever: My second day fishing in Iceland while filming "Yow, Icelandic for Yes" with RC Cone. We had access to Beat One on the Hofsa River. Beautiful beat with a massive waterfall and huge cliff walls. After a few swings through the run, finally got a take from a very hot Atlantic Salmon. First time getting into my backing and the third fish of the day in an unreal setting
  • Favorite place to eat in Montana: The Sac Bar in Three Forks
  • What you splurge on: Do I need that many steelhead flies? Probably not, but also probably
  • Other than fishing for GRG, where else he'd rather be: Swinging for steelhead in the PNW

Maggie Mae Stone

Maggie Mae Stone on a river holding a large shiny Rainbow trout
  • Favorite River: The Upper Madison - my first love
  • Favorite Fly: Big streamers or big dry flies
  • Favorite place for after-fishing cocktail: The Pony Bar
  • Best fish ever: Hebgen Lake runner Brown trout while a grizzly bear watched
  • Favorite place to eat in Montana: Open Range in downtown Bozeman
  • What you splurge on: Jet boats and saltwater fishing trips
  • Other than fishing for GRG, where else he'd rather be: Snowmobiling in the Gallatin mountains

Trey Brassch

Trey Brassch holding up a large Brown trout with a riverin the background
  • Favorite River: The Upper Madison tops the list, but the Bighole in the spring is hard to beat
  • Favorite Fly: $3 Dip and anything BIG, nasty and articulated
  • Favorite place for after-fishing cocktail: Melrose Bar in the spring, Buck's T-4 during the summer, and The Edge Bar & Grill in the fall
  • Best fish ever: The last steelhead I landed
  • Favorite place to eat in Montana: Grizzly Bar in Cameron, Montana
  • What you splurge on: Spey rods, click and pawl reels, and anything steelhead
  • Other than fishing for GRG, where else he'd rather be: Summer in SW Montana are a fisherman's paradise, but I'd always rather be swinging flies for anadromous fish

Why isn't my guide listed?

Well, the guides listed above are considered our “core guides” and work mostly for Gallatin River Guides and maybe a few other folks. Most Montana fly fishing guides are independent contractors and work for a variety of outfitters.

When all of our core group guides are booked, which happens most days during our peak season, we have created a large stable of extremely qualified, professional fishing guides and outfitters who work for us and other shops and outfitters. We personally vet all of our Montana fly fishing guides.

Eleven guides in waders standing along a river bank with their boats nearby

These guides will work very hard for you and ensure you have a great time on the water. We hold our non-core guides to the same high standard as our core guides. Fish with them. You’ll be glad you did.

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