Keyhole Reservoir

Boat Ramps: 4
Access Points: 4
Species: 19

Nestled in northeastern Wyoming, Keyhole Reservoir is a picturesque 9,300-acre impoundment formed by the Keyhole Dam on the Belle Fourche River. This hidden gem offers abundant fishing opportunities with over 50 miles of shoreline, much of which consists of accessible park areas. The reservoir wraps around the town of Pine Haven and serves as a premier fishing destination for both local anglers and visitors. With its diverse fish population and variety of fishing environments, Keyhole provides year-round angling opportunities, including excellent ice fishing when conditions permit. The reservoir's size and numerous amenities, including a marina, boat ramps, campgrounds, and nearby services, make it an ideal location for extended fishing trips.

Wyoming licenses and regulations4 to check before you go

Species & education

Learn what type of fish are at Keyhole Reservoir and what's needed to catch them.

Find which waters have the species you want to catch

Largemouth Bass

Micropterus salmoides

Smallmouth Bass

Micropterus dolomieu

Rainbow Trout

Oncorhynchus mykiss

Brook Trout

Salvelinus fontinalis

Northern Pike

Esox lucius

Walleye

Sander vitreus

Black Crappie

Pomoxis nigromaculatus

Bluegill Sunfish

Lepomis macrochirus

Channel Catfish

Ictalurus punctatus

Common Carp

Cyprinus carpio

Flathead Catfish

Pylodictis olivaris

Freshwater Drum

Aplodinotus grunniens

Green Sunfish

Lepomis cyanellus

Lake Trout

Salvelinus namaycush

River Carpsucker

Carpiodes carpio

Shorthead Redhorse Sucker

Moxostoma macrolepidotum

White Crappie

Pomoxis annularis

White Sucker

Catostomus commersonii

Yellow Perch

Perca flavescens

Fish stocking schedule

Latest 5 stockings

Walleye236,973 fish · 1.2 inJune 2026
Walleye200,091 fish · 1.3 inJune 2025
Northern Pike133,055 fish · 1.7 inMay 2025
Gizzard Shad250 fish · 12.6 inMay 2025
Tiger Muskellunge1,562 fish · 7.4 inOctober 2024

Source

Wyoming Game and Fish Department

Updated Nov 13, 2026. Sizes are the length the agency reports. Dates are as precise as the agency reports them.

Open stocking page

Fishing spots, boat ramps & amenities

Learn how to get on Keyhole Reservoir. Uncover great fishing access points, boat ramps, and all the facilities you need for an unforgettable day on the water. Some locations shown may border or include private property. Always check property boundaries and applicable regulations before visiting. onWater's Public & Private Land layer can help you plan your access with confidence.

Know where you can legally fish on Keyhole Reservoir

See public and private land boundaries along the water, turn on private parcels with owner details to know where permission is required, and find land-trust parcels that offer permitted fishing access.

Wyoming licenses and regulations

Wyoming Boating Regulations

When using any type of watercraft to access a body of water, it is important to follow all federal, state, and local rules and regulations. These rules and regulations include boat permitting and licensing, invasive species inspections and stamps, life jacket and PFD rules, motor size and horsepower restrictions, noise limitations, restrictions on personal watercraft, and many more. Visit the web link below for the most current rules and regulations for this body of water.

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Wyoming Fishing License

A fishing license is required for residents and nonresidents age 14 and over. Nonresidents under age 14 do not need a license if accompanied by an adult possessing a valid Wyoming fishing license.

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Wyoming Fishing Regulations

This river has a variety of species and regulations, including potential floating and/or watercraft restrictions. Because this river is specially managed for species, seasons, angling methods, and watercraft, it is strongly encouraged you check all federal, state, and local regulations before fishing. Visit any of the links below, inquire locally, or contact a local fly shop to learn current regulations and restrictions.

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Wyoming Stream Access Laws

In Wyoming, landowners own the streambed. Anyone may float across private land on navigable water, but the streambed is the property of the owner. Minor and incidental contact with the streambed is not considered trespassing. As stated by Wyoming Game and Fish Department, “Anglers are not allowed to wade fish or fish from a bank or island without permission if the stream bank, island, or streambed is privately owned. Wading, bank fishing, or anchoring without permission is trespassing.”

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Take Keyhole Reservoir with you

The onWater Fish app keeps this water's access points, species and conditions in your pocket, with the tools you use once you're there.

Use the map without signal
Download the map around Keyhole Reservoir to use it offline when coverage drops.
Log your catches here
Keep a private fishing journal for Keyhole Reservoir to find where and when fish are biting for you.
HD depth charts from Garmin
Find drop offs, ledges, channels, points and shallow flats with Garmin depth charts in the app.

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Water and weather conditions (10 day forecast)

See the best times to fish Keyhole Reservoir and check the forecast before you go.