The Most Fun and Memorable Fly-Fishing Experience in Montana!

Quality Gear, Professional Guides, Current Info - Everything You Need For The Perfect Fishing Trip

TAKE IN NATURE, AND EXPLORE THE WATERS OF MONTANA

Big Sky, MT Fishing Trips

Are you on the lookout for some adventure this year? Our team knows just how to find it: a fly fishing trip through the fish-filled rivers of Big Sky and South West Montana. Create unforgettable memories on the water and reel in the perfect catch by letting our team guide you on an all-inclusive fly fishing experience. 

YEAR-ROUND FLY FISHING TRIPS

Whether it’s spring, summer, fall, or winter you can book one of our guided fly fishing trips.

WORLD CLASS TROUT STREAMS

Located in the mountains of southwest Montana, just outside Yellowstone National Park, it's any fly fisher’s paradise.

EXPERIENCED GUIDES

Our professional and fun Montana fly fishing guides can help you discover the best fly fishing spots in Montana and give you a unique experience you won’t forget.

Meeting you where you are at

We can cover all budgets, get you on the best waters at the best times, and provide the right trip for your skill level and needs.

HALF-DAY WALKING & WADING FLY FISHING TRIP

This trip has you and your party fishing the beautiful Gallatin River or its tributaries in and near Big Sky, Montana. This is our most popular guided fishing trip because it gives you a real taste of the Montana fly fishing experience in a short time.

FULL-DAY WALKING & WADING FLY FISHING TRIP

This is the best trip for those who really want to experience fly fishing and enhance their skills. A full day on the water allows for more time honing in your cast and gives us the options to take you to a wider selection of rivers.

FULL-DAY FLOATING FLY FISHING TRIP

Float and fish down a beautiful Montana river with mountain peaks in the distance. While your guide rows the boat down the river you'll get to see over 10 miles of river views and have the opportunity to catch plenty of wild trout.

Guided Fishing Trips Big Sky Montana

We are Experienced, You Don't Need to be!

We've been making memories on our favorite rivers in Montana for over 40 years. Whether you are a beginner or a professional when it comes to fishing, we have the perfect trip for you!


We offer day trips, custom fly fishing adventures, and have great options for the kids. Regardless of your age or ability level, we can give you the greatest fly fishing experience possible.

More THan Just Guided Fishing Trips

Fly Fishing Gear & Rentals

Whether you're a first time fly fisher or a seasoned pro, we have a fully stocked fly fishing shop in Big Sky, MT for ever anglers' needs. We also offer gear rentals!

Find Us On Google Maps
Women's Fly Fishing School

Join us for a fun-filled, no-pressure three-day school of fishing, learning, and exploring some of the best waters on the planet.

Learn More
Fishing Guide School

Our fishing guide school is the place to be if you want to learn the ropes and jumpstart your guiding career.

Learn More
Fishing Reports

Check out our latest fishing reports for Big Sky and southwestern Montana.

Learn More

Reviews We've Reeled In Over The Years

My husband and I had a great time fishing with Gallatin River Guides, and our guide Connor! He had his work cut out for him as neither of us had ever been fly fishing! He was very personable, knowledgeable and had a great sense of humor. We ended up landing 5 fish! We travel to Big Sky often and plan on fly fishing again with Gallatin River Guides and will for sure request Connor.

Jackie A.

The Gallatin crew hosted my friends and I for a guided trip in early mid-August in Big Sky. When I called to inquire about 14 guys getting a guided trip on the river, I thought I would be laughed off the phone. Especially since it was a week or two before the trip. But they could not have been more accommodating and easy to work with. Great pricing and the fact they loan you all the gear makes it a no brainer for folks looking to fly fish the Gallatin. I had never fly-fished before and even managed to catch a few, mostly thanks to our expert guide Carson.

Daniel M.

Great morning on the river with Gallatin River Guides. Easy booking and they were able to accommodate relatively last minute. My guide Tommy was super personable and knowledgeable about fly fishing in general and the Gallatin River in particular. After a slow start we ended up with 5 fish on the half day. Highly recommend and will be booking with them again next time I'm in Big Sky.

Jeff S.

Gallatin River Guides is a very professional and fun guide service! If you want to catch some fish definitely go give them a call! My dad and I caught 9 Rainbow trout in total. Our Guide James was really knowledgeable about the river and was very passionate about it. 100% would recommend to anyone who wants to have a great experience while staying in Montana! No experience is required.

Drew H.

Lindsay was fantastic! She's very passionate about fly fishing and took us to a gorgeous spot where my wife and I each caught about a 14" rainbow, in addition to a number of others! She's very professional and incredibly fun to be around. The guides at the building were very effective in sizing the two of us up with the right equipment, waders, and boots. A must-do for anybody visiting the Bozeman area!

Robert K.

It was our 6th and final day in Big Sky, Montana. Being from Texas and confident in bass fishing. I wanted to fish for trout, but never used a fly rod. So I went and bought a cheap spinning rig from Walmart in Bozeman. I wasn’t confident in how to set this rig up to catch trout. I went to Gallatin River Guides and asked for help. They welcomed me with open arms set my rig up with an indicator lead by a sinking fly and trailed by a nymph. He even gave me pointers on how to identify the best spots. I bought a couple more items and I was off. I caught 10 fish that day. 3 white fish and 7 trout! Thank you, to the gentlemen from San Antonio that help me out Sunday morning!!

Bobby C.

What a wonderful day my husband Chuck and I had on our first fly fishing experience. GRG is a top notch organization. From booking the trip, to arriving/prepping and then meeting our guide, it couldn't have gone smoother. Our guide, Will, was patient in teaching us and was insistent in finding us a great place to fish without other distractions, Within 10 minutes, I caught a 18" rainbow trout! He instructed him while I reeled it in myself without having a clue as to what I was doing. Thank you GRGs and Will for making this the first of many future fly fishing trips!!

Kim H.

Start Your Fly Fishing Adventure Today And Explore The Montana Waters With Our team

Let's Talk Fishing!