Nearby water: Gallatin River, Montana. Not a photo of this guide service.

The upper Gallatin River in the Yellowstone National Park section of the Gallatin valley. Photo: NPS / Diane Renkin, public domain, via Wikimedia Commons

East Slope Outdoors

Fly-fishing guide · Big Sky, MT

Unclaimed · Own this business? Claim it

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At a glance

Trips, waters and species named on the outfitter’s website. Waters named don’t confirm where they’re permitted to guide, public access or current conditions; the website may cover trips elsewhere. Availability isn’t shown here; ask for dates.

Float trips
Wade trips
Beginners & lessons
Lodge packages

Linked names open the water page.

Trout

Trips

As stated on their website. Seasons shift with water and regulations.

Trip lengths: Half day · Full day

About East Slope Outdoors

Fly-fishing guide service based in Big Sky, MT offering float trips, wade trips and trips for beginners.

More about East Slope Outdoors

Waters named on its website include Madison River, Gallatin River and Yellowstone River. Species named: trout.

Fly-fishing guideFly fishing mentioned on their website: yes

Their website is about fly fishing.

Check flows on US waters

Where it is

Approximate location (town): the circle marks Big Sky, MT, not the outfitter’s address. Ask where trips start.

Approximate location (town) of East Slope Outdoors

Map: © OpenStreetMap contributors · OpenFreeMap · © OpenMapTiles

Directions

In their own words

Beginners welcomeFrom their website, read Oct 20, 2026 (opens their website)

Self-reported, not checked by us. Confirm when you book.

Contact through Legendary Fly Gear

Not on Legendary Fly Gear yet

No messages until they claim it. Tell us you're interested; we'll let them know.

Run this business? Claim the listing, free.

Where these details come from

Phoneeastslopeoutdoors.com (opens in a new tab)
Addresseastslopeoutdoors.com (opens in a new tab)
Social: Instagrameastslopeoutdoors.com (opens in a new tab)
Social: Facebookeastslopeoutdoors.com (opens in a new tab)
Trip type: Float tripseastslopeoutdoors.com (opens in a new tab)
Trip type: Beginners & lessonseastslopeoutdoors.com (opens in a new tab)
Trip type: Wade tripseastslopeoutdoors.com/fly-fishing (opens in a new tab)
Trip type: Lodge packageseastslopeoutdoors.com/fly-fishing (opens in a new tab)
Trip length: Half dayeastslopeoutdoors.com (opens in a new tab)
Trip length: Full dayeastslopeoutdoors.com (opens in a new tab)
Water: Madison Rivereastslopeoutdoors.com/fly-fishing (opens in a new tab)
Water: Gallatin Rivereastslopeoutdoors.com/fly-fishing (opens in a new tab)
Water: Yellowstone Rivereastslopeoutdoors.com/fly-fishing (opens in a new tab)
Species: Trouteastslopeoutdoors.com (opens in a new tab)
Fly-fishing mentionseastslopeoutdoors.com (opens in a new tab)
Rates page linkeastslopeoutdoors.com (opens in a new tab)

Name, town and category come from Overture Maps Places. We record facts from the outfitter’s website, and show its own logo and one photo from its own website, credited to it and removed on request. We never copy its descriptions, reviews or prices. Fishing style is our reading of the words used on their website, not a rating.

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Pick up flies, licenses and local advice before your trip. Shop listings are unclaimed too; check hours with the shop.

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