Our Keyhole State Park guide covers practical planning for Keyhole State Park Wyoming — best time to visit, getting there, and what to do on the ground.
Why Visit Keyhole State Park
As the Roam States editorial team, we’ve explored countless corners of the American West, and we can confidently say that Keyhole State Park Wyoming offers a distinct charm that sets it apart. Situated on the western edge of Wyoming’s Black Hills, this state park is a true outdoor enthusiast's paradise, providing unparalleled access to the expansive Keyhole Reservoir. The park is a haven for water sports, exceptional fishing, and diverse camping experiences, all set against the dramatic backdrop of the region's unique geology, with iconic Devils Tower National Monument often visible in the distance.
We find Keyhole State Park to be a quintessential Wyoming experience, blending the tranquility of a lakeside retreat with the rugged beauty of the high plains. It's a place where the sun glints off the water, beckoning boaters and anglers, while the surrounding landscapes invite exploration on foot or by bike. Beyond its natural allure, the park boasts a rich history, named after the "Keyhole" livestock brand used by the McKean brothers who once ranched in the area. This blend of natural beauty, recreational opportunities, and a touch of local lore makes Keyhole State Park Wyoming a compelling destination for any traveler seeking an authentic Western adventure.
Who It's Best For
Keyhole State Park caters to a wide array of visitors, making it an ideal destination for various types of travelers. Our team recommends it particularly for:
- Water Sports Enthusiasts: With 14,720 acres of navigable water on Keyhole Reservoir, the park is perfect for boating, water skiing, swimming, and even lake surfing. If you love being on the water, this is your spot.
- Anglers: Keyhole Reservoir is renowned for its excellent fishing, with a diverse population including walleye, crappie, perch, smallmouth bass, northern pike, drum, and catfish. Some of Wyoming's largest fish have been caught here. Both ice fishing and open-water fishing are popular, attracting serious anglers and casual fishermen alike.
- Campers & RVers: The park offers ten campgrounds with a total of 286 campsites, accommodating both tents and RVs. Many sites provide scenic views, and the ability to reserve spots makes planning easy. There are even cabins and a unique treehouse available for overnight stays.
- Families: With a variety of activities from swimming at the beach to hiking and bird-watching, Keyhole State Park provides ample opportunities for family fun and outdoor education. The open spaces and diverse recreation ensure there's something to keep all ages engaged.
- Bird Watchers: Keyhole State Park is a mecca for both resident and migrating birds of all species, offering fantastic bird-watching opportunities throughout the year.
- Road Trippers: Its location on the western edge of the Black Hills, easily accessible off I-90, makes it a convenient stop or a primary destination for those exploring the best places in Wyoming or on a USA road trip. It’s also a great base for visiting nearby attractions like Devils Tower National Monument, just 18 miles away.
While the park is open year-round, certain activities are seasonal. For instance, the main camping reservation season runs from May 15th to September 15th, with first-come, first-served camping outside these dates.
Getting There & Parking
Understanding how to get to Keyhole State Park is straightforward, as it's conveniently located and well-signposted. Keyhole State Park is situated on the western edge of the Black Hills, nestled between the towns of Sundance and Moorcroft. For most visitors, the easiest way to get to Keyhole State Park is via Interstate 90. Take exit 165, then travel north approximately 6 miles, and the entrance to the Park Headquarters will be on your left. Alternatively, you can take exit 153 or 154 in Moorcroft, then Highway 14 north for 6 miles, and then Highway 113.
Parking at Keyhole State Park
Parking is generally available throughout the park at various campgrounds, boat ramps, and day-use areas. When planning your visit, be aware of the daily use fees. As of 2026, the daily use fee is $7 per vehicle for Wyoming residents and $9 per vehicle for non-residents. These fees are required to enter and use park facilities. Fee booths are typically open from Memorial Day through Labor Day, but outside of this period, automated fee machines (card only) are available at every entrance, or a cash/check fee canister is located at the Headquarters entrance. If you're camping, the camping fee includes the daily use fee.
For those utilizing the Keyhole Marina, there are specific parking guidelines. Guests are allowed a maximum of two vehicles per campsite, with extra vehicles needing to use the State overflow parking. Parking is strictly allowed only in designated areas. We recommend checking the official Wyoming State Parks website (Travel Wyoming) or calling the park directly for the most current information on fees and any temporary parking restrictions, especially during peak seasons or events.
Top Things to Do
Keyhole State Park is a hub of activity, offering a diverse range of things to do that cater to every interest, from serene nature observation to exhilarating water sports. Our team has compiled the top things to do to help you make the most of your visit.
Water Activities on Keyhole Reservoir
The vast Keyhole Reservoir is the heart of the park, providing endless opportunities for aquatic recreation. Boating is immensely popular, with five boat ramps available, including those at Wind Creek, Coulter Bay, Pat's Point, and the marina. Whether you're into water skiing, wakeboarding, or simply cruising, the expansive waters are ideal. Kayaking and paddleboarding offer a more tranquil way to explore the shoreline and coves. Please remember that boats must be properly registered and inspected for aquatic invasive species before launching, and always ensure you have the necessary safety equipment like life jackets.
Exceptional Fishing Opportunities
Fishing at Keyhole Reservoir is a major draw, with many anglers reporting excellent catches. The reservoir is home to a variety of fish, including walleye, crappie, perch, smallmouth bass, northern pike, drum, and catfish. We recommend obtaining a valid Wyoming fishing license and conservation stamp and familiarizing yourself with the current regulations, which are updated annually. For northern pike in Keyhole Reservoir, the creel limit is three per day or in possession, with all northern pike under 30 inches required to be released immediately. Fishing licenses are available locally at Keyhole Marina and Paradise Grocery Store in Pine Haven. Ice fishing is a favorite winter activity, while boat and shore fishing are popular during warmer months.
Camping and Unique Stays
Keyhole State Park boasts ten campgrounds with 286 campsites, accommodating both tents and RVs. Reservations are highly recommended, especially during the peak season from May 15th to September 15th. Beyond traditional camping, the park offers unique lodging options, including four log cabins and Wyoming's first state park treehouse, which can be reserved for overnight stays. These provide a comfortable base for exploring all the things to do in the park.
Keyhole State Park Hiking Trails
While Keyhole State Park is primarily known for its water-based recreation, it also offers opportunities for hikers. The park features scenic trails that allow visitors to explore the diverse landscapes surrounding the reservoir. These Keyhole State Park hiking trails offer a chance to observe wildlife, enjoy panoramic views of the water, and even catch glimpses of Devils Tower National Monument. For example, during the annual First Day Hikes, a 1-mile hike on easy terrain is offered at Coulter Bay Cliffs Shelter. We recommend consulting the Keyhole Park Map and Keyhole Trails Map, available on the Wyoming State Parks website, to plan your routes and understand trail conditions. While extensive, challenging backcountry routes may not be the primary focus here, the Keyhole State Park hiking trails provide enjoyable walks for most fitness levels, allowing you to immerse yourself in the natural beauty of the area.
Wildlife Viewing and Bird Watching
The park is a vibrant ecosystem, making it excellent for wildlife viewing. Keep an eye out for antelope and deer, which are known to inhabit the area. Bird watchers will be particularly delighted, as Keyhole State Park is a significant stop for both resident and migrating birds. Bring your binoculars and a field guide to identify the various species that call this area home.
Picnicking and Group Gatherings
Keyhole State Park offers numerous picnic areas perfect for a leisurely meal outdoors. Additionally, three group shelters are available for reservation, making the park an excellent venue for weddings, family reunions, or company picnics. There are also six group campsites across Tatanka, Pat's Point, and Cottonwood campgrounds.
Other Activities
Depending on the season, you might also find opportunities for geocaching, biking, and even archery. The park also hosts various events throughout the year, so it's worth checking the official Keyhole State Park website for an updated schedule.
Best Time to Visit
Determining the best time to visit Keyhole State Park largely depends on your preferred activities, as the park offers distinct experiences throughout the year. Our team has outlined the seasonal highlights to help you plan your trip.
Summer (June – August)
Summer is undeniably the peak season at Keyhole State Park. The warm weather is perfect for all water-based activities on Keyhole Reservoir, including swimming, boating, water skiing, and fishing. The fee booths are open from Memorial Day through Labor Day, indicating the busiest period. All campgrounds are open, and water systems and docks are typically available from May 15th to October 15th, weather permitting. However, be aware that summer also brings the highest crowds, and reservations for camping are essential during this time, running from May 15th to September 15th. As of June 2026, the park is under Stage 2 Fire Restrictions, prohibiting open flames and wood fires, though approved gas grills with lids are permitted. The 2026 July 4th fireworks show was canceled due to these conditions. Also, be mindful of potential Harmful Cyanobacterial Blooms (HCB) advisories; visitors are advised to keep themselves, pets, and livestock out of green water.
Spring (April – May) & Fall (September – October)
These shoulder seasons offer a fantastic balance of pleasant weather and fewer crowds. Spring sees the ice come off the lake, typically between late March and early May, opening up boating opportunities. Fishing remains excellent, and the milder temperatures are ideal for hiking and wildlife viewing. Fall brings crisp air and often vibrant foliage, creating a beautiful backdrop for outdoor activities. The camping reservation season extends into mid-September, but outside of that, campsites become first-come, first-served. The docks and water systems are usually available until mid-October. These seasons are perfect for those seeking a more serene experience.
Winter (November – March)
Keyhole State Park remains open year-round, and winter offers unique recreational opportunities, particularly for ice fishing. The lake typically freezes over between October and December. While many facilities may be closed (like the shower house, which is currently closed), the quiet solitude and stark beauty of the winter landscape can be very appealing. Cabins in Tatanka campground can be reserved year-round. The park also participates in the national "First Day Hikes" initiative on New Year's Day, waiving day-use fees for guided hikes. If you're prepared for colder temperatures and potential snow, winter can be a rewarding time to visit.
Overall, we recommend late spring and early fall for the best all-around experience, balancing good weather with manageable crowd levels. However, if water sports are your priority, summer is your season, and if ice fishing or solitude appeals, winter has its charms.
Where to Stay Nearby
When planning your visit to Keyhole State Park, you'll find a range of accommodation options, primarily centered around camping within the park itself, along with some choices in nearby towns. Our team has gathered the key information on where to stay nearby to help you plan your overnight arrangements.
Camping Within Keyhole State Park
The most immersive way to experience the park is by staying at one of its ten campgrounds, which collectively offer 286 campsites. These campgrounds accommodate both tents and RVs, with some sites providing electric and water hookups, particularly in the Tatanka and Coulter Bay campgrounds. The camping reservation season runs from May 15th to September 15th, and reservations are highly recommended, especially for popular sites and holiday weekends. Outside of this season, campsites are available on a first-come, first-served basis. Reservations for Wyoming State Parks can be made online at Reserve.Wyoming.Gov or by phone at 877-WYO-PARK (877-996-7275). The base camping fee for residents is $10 and $18 for non-residents, with additional fees for day use, electric hookups ($10 per night), and sales/lodging tax. Quiet hours are from 10 PM to 6 AM, with no music or generators permitted during this time.
Unique Lodging Options
Beyond traditional campsites, Keyhole State Park offers distinctive overnight experiences. You can reserve one of four log cabins or Wyoming's first state park treehouse. These unique accommodations provide a comfortable and memorable stay, especially for those looking for something beyond a tent or RV. The treehouse, for example, features a two-bedroom living space with a queen bed and bunk beds, a private deck with reservoir views, and a propane BBQ, though it does not have bathrooms or running water. Cabins are available for approximately $67.80 per night. Reservations for these facilities can be made through Reserve.Wyoming.Gov.
Keyhole State Park Lodging in Nearby Towns
For those preferring traditional hotel or motel accommodations, the closest towns to Keyhole State Park offer options. Moorcroft, Wyoming, is a nearby community that provides some lodging choices. Another option is Sundance, Wyoming, which also has a selection of hotels and motels. While not directly adjacent to the park, these towns offer convenient access and a wider range of amenities like restaurants and grocery stores. For a broader selection of hotels and services, Gillette, Wyoming, is approximately 60 miles from Keyhole State Park. Gillette offers larger shopping centers and more extensive lodging facilities. When considering Keyhole State Park lodging, our team suggests balancing the convenience of staying within the park with the amenities and services available in these nearby communities, especially if you prefer not to camp.
Keyhole Marina Camping
The independently operated Keyhole Marina also offers 15 campsites, with 10 of them featuring water and electrical hookups. These sites are conveniently located near the marina store, boat ramp, and provide lake views. Online reservations for Keyhole Marina campsites begin April 1, 2026, at 6:00 PM, with weekday rates at $45/night and weekend rates at $60/night. Marina campers must also adhere to Keyhole State Park regulations, including quiet hours.
Sample 2-Day Itinerary
To help you make the most of your visit to Keyhole State Park, our team has crafted a sample 2-day itinerary, designed to give you a comprehensive experience of the park's diverse offerings. This itinerary balances relaxation with adventure, ensuring you capture the essence of this Wyoming gem.
Day 1: Arrival & Water Adventures
- Morning (Arrival & Setup): Arrive at Keyhole State Park, check into your reserved campsite, cabin, or treehouse. Take some time to set up camp and get acquainted with your surroundings. Head to the park headquarters if you need to pay fees or gather maps.
- Late Morning (Boating & Water Sports): Launch your boat or rent one from Keyhole Marina. Spend the late morning enjoying the vast Keyhole Reservoir. Water ski, tube, or simply cruise the lake, taking in the views of the Black Hills and distant Devils Tower National Monument.
- Lunch: Enjoy a picnic lunch at one of the many scenic picnic areas along the shoreline or return to your campsite for a relaxed meal.
- Afternoon (Swimming & Beach Time): Head to the park's beach area for swimming and sunbathing. The calm waters are perfect for a refreshing dip, especially on a warm summer day.
- Late Afternoon (Shore Fishing): Cast a line from the shore, trying your luck for walleye, crappie, or northern pike. Remember your Wyoming fishing license.
- Evening (Campfire & Stargazing): Prepare dinner at your campsite. If fire restrictions allow (check current Stage 2 Fire Restrictions which prohibit wood fires but permit approved gas grills with lids), enjoy a campfire. Otherwise, utilize a gas grill. As night falls, take advantage of the dark Wyoming skies for incredible stargazing.
Day 2: Hiking, Wildlife & Departure
- Morning (Hiking & Nature Exploration): After breakfast, explore some of the Keyhole State Park hiking trails. Opt for an easy loop around one of the campgrounds or a more extended walk to a scenic overlook. Keep an eye out for diverse bird species and other wildlife.
- Late Morning (Bird Watching & Photography): Dedicate some time to bird watching. Keyhole is a mecca for resident and migrating birds. Bring your camera to capture the natural beauty and any wildlife you encounter.
- Lunch: Grab lunch at Keyhole Marina, which sells groceries and beverages, or pack a meal to enjoy at a scenic spot in the park.
- Afternoon (Last Cast & Souvenirs): Enjoy one last fishing session on the reservoir or visit the marina for any last-minute supplies or souvenirs.
- Late Afternoon (Pack Up & Depart): Begin packing up your campsite or checking out of your cabin/treehouse. Take one last look at the reservoir and the surrounding landscape before heading out.
This itinerary is flexible and can be adjusted based on your interests and the length of your stay. Remember to check the official Keyhole State Park website for any alerts, such as fire restrictions or HCB advisories, before your visit.
Is It Worth Visiting?
As the Roam States editorial team, we frequently evaluate destinations for their unique value and whether they truly deliver on a memorable travel experience. When it comes to Keyhole State Park Wyoming, our verdict is a resounding yes: it is absolutely worth visiting, especially for those who appreciate a blend of water-based recreation, natural beauty, and a relaxed outdoor atmosphere.
What makes Keyhole State Park particularly compelling is its versatility. It's not just a single-activity destination; it offers a comprehensive outdoor experience. The expansive Keyhole Reservoir is a playground for boaters, swimmers, and water skiers, providing ample space for everyone to enjoy the water. For anglers, the reputation of Keyhole Reservoir for producing large fish, including walleye and northern pike, is a significant draw. The diverse camping options, from traditional tent sites to RV hookups, cabins, and even a unique treehouse, cater to various comfort levels and preferences, making Keyhole State Park lodging appealing to a broad audience.
Beyond the water, the park's setting on the western edge of the Black Hills provides a picturesque backdrop, with opportunities for hiking, bird watching, and simply enjoying the serene Wyoming landscape. The occasional glimpse of Devils Tower National Monument adds a touch of iconic Western grandeur to the views. Its accessibility off I-90 also makes it a convenient stop for those exploring the wider region, including other best places in Wyoming like Bighorn Canyon National Recreation Area, Bridger-Teton National Forest, or even the Buffalo Bill Center of the West.
While some may seek the dramatic mountain peaks of Grand Teton or the geothermal wonders of Yellowstone, Keyhole offers a different, yet equally rewarding, experience. It’s a place where you can truly unwind, connect with nature, and engage in a variety of activities without the overwhelming crowds often found at more famous national parks. The fact that it's open year-round, with unique offerings like ice fishing in winter, further adds to its appeal. We believe Keyhole State Park offers excellent value for its fees and provides a genuinely enjoyable escape into the Wyoming outdoors.
Last updated: 2026-07-12 by the Roam States team.
Last updated: 2026-07-12 by the Roam States team.
Our Keyhole State Park guide covers practical planning for Keyhole State Park Wyoming — best time to visit, getting there, and what to do on the ground.
Why Visit Keyhole State Park
As the Roam States editorial team, we’ve explored countless corners of the American West, and we can confidently say that Keyhole State Park Wyoming offers a distinct charm that sets it apart. Situated on the western edge of Wyoming’s Black Hills, this state park is a true outdoor enthusiast's paradise, providing unparalleled access to the expansive Keyhole Reservoir. The park is a haven for water sports, exceptional fishing, and diverse camping experiences, all set against the dramatic backdrop of the region's unique geology, with iconic Devils Tower National Monument often visible in the distance.
We find Keyhole State Park to be a quintessential Wyoming experience, blending the tranquility of a lakeside retreat with the rugged beauty of the high plains. It's a place where the sun glints off the water, beckoning boaters and anglers, while the surrounding landscapes invite exploration on foot or by bike. Beyond its natural allure, the park boasts a rich history, named after the "Keyhole" livestock brand used by the McKean brothers who once ranched in the area. This blend of natural beauty, recreational opportunities, and a touch of local lore makes Keyhole State Park Wyoming a compelling destination for any traveler seeking an authentic Western adventure.
Who It's Best For
Keyhole State Park caters to a wide array of visitors, making it an ideal destination for various types of travelers. Our team recommends it particularly for:
- Water Sports Enthusiasts: With 14,720 acres of navigable water on Keyhole Reservoir, the park is perfect for boating, water skiing, swimming, and even lake surfing. If you love being on the water, this is your spot.
- Anglers: Keyhole Reservoir is renowned for its excellent fishing, with a diverse population including walleye, crappie, perch, smallmouth bass, northern pike, drum, and catfish. Some of the state's largest fish have been caught at Keyhole. Both ice fishing and open-water fishing are popular, attracting serious anglers and casual fishermen alike.
- Campers & RVers: The park has 10 campgrounds with a total of 286 camping sites, accommodating both tents and RVs. Many sites provide scenic views, and the ability to reserve spots makes planning easy. There are even cabins and a unique treehouse available for overnight stays.
- Families: With a variety of activities from swimming at the beach to hiking and bird-watching, Keyhole State Park provides ample opportunities for family fun and outdoor education. The open spaces and diverse recreation ensure there's something to keep all ages engaged.
- Bird Watchers: Keyhole State Park is a mecca for both resident and migrating birds of all species, offering fantastic bird-watching opportunities throughout the year.
- Road Trippers: Its location on the western edge of the Black Hills, easily accessible off I-90, makes it a convenient stop or a primary destination for those exploring the best places in Wyoming or on a USA road trip. It’s also a great base for visiting nearby attractions like Devils Tower National Monument, just 18 miles away.
While the park is open year-round, certain activities are seasonal. For instance, the main camping reservation season runs from May 15th to September 15th, with first-come, first-served camping outside these dates.
Getting There & Parking
Understanding how to get to Keyhole State Park is straightforward, as it's conveniently located and well-signposted. Keyhole State Park is situated on the western edge of the Black Hills, nestled between the towns of Sundance and Moorcroft. For most visitors, the easiest way to get to Keyhole State Park is via Interstate 90. Take exit 165, then travel north approximately 6 miles, and the entrance to the Park Headquarters will be on your left. Alternatively, you can take exit 153 or 154 in Moorcroft, then Highway 14 north for 6 miles, and then Highway 113.
Parking at Keyhole State Park
Parking is generally available throughout the park at various campgrounds, boat ramps, and day-use areas. When planning your visit, be aware of the daily use fees. As of 2026, the daily use fee is $7 per