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Keyhole State Park
 

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About Our Site - Keyhole State Park

 

Keyhole State Park offers swimming, hiking, boating, water skiing, bird-watching and fishing. Some of the state’s largest fish have been caught at Keyhole. You can also reserve one of our 3 group shelters to host weddings, family get togethers and company picnics. Keyhole State Park is located on the western edge of the Black Hills, between Sundance and Moorcroft, and is easily accessed off I-90 at exit 165. Travel north 6 miles and the entrance to Park Headquarters will be on your left. Keyhole State Park has 10 campgrounds, all of which are reservation only.

Cottonwood-Bay

 

Wyoming State Parks Awarded Helmsley Charitable Trust Grant for Visitor Improvements at Keyhole State Park

MOORCROFT, Wyo. – Oct. 1, 2026 – The Wyoming Department of State Parks and Cultural Resources has been awarded a $3 million grant from The Leona M. and Harry B. Helmsley Charitable Trust to support the development of a new visitor center in the Coulter Bay area at Keyhole State Park. 


“The Helmsley Charitable Trust continues to make significant positive impacts possible across Wyoming’s state parks and historic sites, and we value their continued partnership,” said Dave Glenn, director of the Wyoming Department of State Parks and Cultural Resources. “Funding opportunities like this allow us to make meaningful, long-term investments in our parks while responding to the needs of the communities they serve.”


The new visitor center will enhance recreation and education opportunities, improve visitor services, and support park operations. Designed to complement the surrounding landscape and natural character of the park, the facility will serve as a central hub for visitors and a gateway to Keyhole State Park and northeast Wyoming, with interpretive exhibits highlighting the area’s natural and cultural history, space for community gatherings, and resources to help visitors explore recreation opportunities throughout the park.


“Being outdoors and having access to places where people can recreate, connect with their communities, and enjoy nature is an important part of health and wellness,” said Walter Panzirer, a trustee of the Helmsley Charitable Trust. “Keyhole State Park is a great example of a place that serves both the people who live here and those who come to experience Wyoming. We’re pleased to help make this investment in the park and in the surrounding community, and we look forward to seeing how this new visitor center will serve people for generations to come.”

 

The visitor center will also support year-round park operations and natural resource management, and serve as an emergency shelter for the park and the nearby community of Pine Haven in the event of a natural disaster. The facility will be developed in conjunction with broader improvements planned for the Coulter Bay area, including boat ramp and courtesy dock enhancements.


“The Pine Haven Town Council congratulates Keyhole State Park on securing grant funding for the new Coulter Bay visitor center, and appreciates the Park’s collaboration with the Town throughout the application process,” said Rob Norton, mayor pro tem of Pine Haven. “As this project moves forward, the Council looks forward to continuing that partnership—including the boat dock and ramp improvements on the Pine Haven side of the lake that the Town has long identified as a priority.”


Wyoming State Parks hosted three public meetings in early 2026 to gather input from park users and area residents and help identify priorities and features for the proposed facility. Feedback received through that process has helped inform the project as it moves into the design phase. Construction is currently scheduled for completion in fall 2028.


For more information about Keyhole State Park, including recreation opportunities, amenities, and visitor information, visit wyoparks.wyo.gov/keyhole.

Figure-1-42keyhole-Jentry-discussing-existing-ammenities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1: The Coulter Bay area at Keyhole State Park, where a new visitor center is planned as part of construction projects supported by a grant from The Leona M. and Harry B. Helmsley Charitable Trust. Figure 2: Jentry Eatherton, assistant superintendent at Keyhole State Park, discussing existing amenities with a community member during a public meeting in January 2026. 

 

 

Park Fees

Click here to view the Permits & Fees page

 

 
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Site Status

 
Alert:

Stage 2

Fire Restrictions in Place

Prohibited: 
Open flames/wood fires, gas fireplaces/firepits, tiki torches, and fireworks.
 Permitted:
Approved gas grills with a lid.

HCB Advisories: 

Monitoring Keyhole Reservoir

Keep yourself, pets, and livestock out of green water, floating scums or clumps.
If contact occurs: rinse with clean water immediately and contact a doctor or veterinarian if symptoms develop.
 
Visit: Bit.ly/WyoHCB2026 for more information and to help report sightings

 

Attention:


Coulter Bay Boat Dock:

The dock is currently in and available for use.

 

Facilities:

All campgrounds are open, the water is on, and the shower house is available.

 

Tatanka Campground:

Sites with both electric and water hookups are available.

 

Coulter Bay Campground:

Sites with electric hookups are available.

 

Quiet Hours:

10 PM – 6 AM. Please, no music or generators during this time.

 

Notice: 


End-of-Season Closures & Facilities Update

  • September 30, 2026

    • Cottonwood and Homestead Campgrounds close for the season.

    • Water is turned off at Cottonwood and Homestead.

  • October 15, 2026

    • Arch Rock, Pronghorn, and Beach Area Campgrounds close for the season.

    • Water is turned off for all campgrounds.

    • Shower House and Fish Cleaning Station close for the season.

  • November 1, 2026

    • All docks will be removed from the water and will be inaccessible.

    • Note: Dock removal date is subject to change based on weather.

 

  • Camping reservation season is May 15th - September 15th. All campsites are first come, first served outside of this time period. Cabins in Tatanka may be reserved year-round through Reserve.Wyoming.Gov. A reservation is needed 48 hours in advance during the off-season.
  • Docks and water systems are typically available annually from May 15th - October 15th (weather permitting).
  • RV dump station is available seasonally, weather dependent.
  • Fish cleaning station is available seasonally.
  • Call 307-756-3596 to check current availability.

 

Keyhole Public Forum
The Wyoming Department of State Parks and Cultural Resources has hosted three public forums to update the public and gather feedback on a proposed visitor center in the Coulter Bay Area at Keyhole State Park.
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Hours

 
  • Our site is open year-round.
  • Our fee booths (card only) are open Memorial Day through Labor Day. When the booths are closed, please use the automated fee machines (card only) located at every entrance or the fee canister (cash/check only) at the Headquarters entrance to pay fees.

 

Map

Phone Number

 

307-756-3596

 

Map

 Location

 

 Keyhole State Park
 22 Marina Rd
 Moorcroft, WY 82721

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