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.

Pat Straub

Pat Straub
  • 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

Bob Merryman
  • 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
  • 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
  • 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
  • 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
  • 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

Blake Majors

Blake Majors
  • Favorite River: Big Hole or Yellowstone
  • Favorite Fly: Pink Pookie
  • Best fish ever: 42" Redfish in South Texas
  • Favorite place to eat in MontanaRib 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

Rick Fancher

Rick Fancher
  • 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
  • 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 MontanaYork 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

Shane Stalling

Shane Stalling
  • 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 Barin 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

Trey Brassch

Trey Brassch
  • 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 MontanaGrizzly Barin 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.

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.