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sunset over the reservoir at seminoe state park in wyoming

Sunset over the reservoir at Seminoe State Park. Photo: Park Facebook page

Seminoe State Park is often referred to as the ‘true treasure of Wyoming’ with its wide open water and friendly atmosphere. It’s located in Carbon County 35 miles north of the small town of Sinclair and 75 miles west of Caspar.

This Wyoming state park lies on the northwest side of the Seminoe Reservoir at the base of the Seminoe Mountains and comprises some 1,639 acres of land around 19,000 acres of water with mountains as high as 6,460 feet. The park was established in 1965 about 45 years after the Seminoe Dam was built.

Come visit this ‘oasis in the desert’ and discover for yourself all that this beautiful area has to offer. Bring the entire family and have a pleasant time camping, hiking, fishing, boating, swimming, sightseeing and exploring here in rustic Wyoming.


Sinclair is considered the gateway to several local recreational areas – Historic Sinclair, Parco/Sinclair Museum, Seminoe State Park and Sinclair Golf Club. Seminoe State Park is probably the prettiest and most special of them all.

Not only is it an ideal day spot to set up camp or just visit for the day, but it is also thought highly of as a wedding and special event venue.

So much so that there are several group sites that can be reserved for such special events.

Here are the other popular activities that you can do at Seminoe State Park:

Boating at Seminoe State Park

The Seminoe Reservoir is 21 miles long and fed by 2 rivers, the North Platte River and the Medicine Bow River, meaning that there is a lot of space for boating (as well as other water activities). And it’s very windy on the reservoir making it ideal for wind powered boats.

There are boat docks and ramps at both the North and South Hills areas as well as private ramps at Seminoe Boat Club and Medicine Bow Boat Ramp.

Seminoe Boat Club is privately owned and also has a restaurant, general store and campground.

Swimming at Seminoe State Park

The large reservoir ensures many opportunities for swimming (during the warmer months anyway). All 3 campgrounds have beach areas but the best one is at Sunshine Beach. Sandy Mountain Day Use Area also has a nice sandy beach and 2 picnic areas.

Fishing at Seminoe State Park

The reservoir is regularly stocked with rainbow and cutthroat trout making this an angler’s dream spot to fish. You can also catch walleye and brown trout here. Pick up a license on your way to the park or get one at the Seminoe Boat Club.

Hiking at Seminoe State Park

There aren’t any designated trails at the park but all park land and BOR (Bureau of Reclamation) land can be hiked on. There are many overlooks with spectacular views and even a geocaching site to discover.

The Seminoe Mountains around the park attracted gold prospectors during the late 1800s and there are many pathways throughout the area.

Nearby Morgan Creek Habitat area has open range hiking and biking.

Biking at Seminoe State Park

Just as there aren’t any designated trails for hiking, the same is true for mountain biking, but you are allowed to ride on any road, park road and on BOR land.

Horseback Riding at Seminoe State Park

There are not any equine facilities at the park but horses are allowed on the BOR’s land located around the park.

Hunting at Seminoe State Park

Hunting is not allowed inside of the park boundaries but is in the public land surrounding the park. Be sure to stay at least 400 yards away from campsites and have a valid hunting license with you.

Wildlife at Seminoe State Park

This area is rich with wildlife, as is the entire state of Wyoming! If you’re a bird lover you’ll spot many local and migrating species as well as many waterfowl.

Mammals of all sizes and shapes reside here. Keep an eye open for bighorn sheep, elk, mule deer, antelope, coyotes, rabbits, mountain lions, bobcats, skunks and racoons.

Pets at Seminoe State Park

Pets are allowed as long as they are leashed and picked up after.

Camping at Seminoe State Park

Camping at Seminoe State Park is by reservation only. All sites can be either tent or RV but there are only 13 sites with electric hookup (at North Red Hills Campground). Unfortunately, there aren’t any water hookups available inside the park.

Drinking water is available during the summer months. Spigots are located at the North Red Hills Campground and the South Red Hills Campground.

There are also fire pits, picnic tables, playgrounds, horseshoe pits and comfort stations available to make your stay more pleasant. The restrooms are vault style only, not flush, and are located throughout the park.

Here are more details about each campground:

  • Sunshine Beach Campground – has 38 campsites close to the beach area.
  • North Red Hills Campground – has 30 sites (13 have electric hookups), a boat launch and a playground. Something to keep in mind when booking your reservation – it’s very windy at this campground.
  • South Red Hills Campground – 2 levels containing 21 campsites all together. The upper level sites have views of the lake while the lower level is close to the boat launch and beach area. The lower level is more protected from the wind but the upper level is not and can get quite cold. There’s also a playground at this campground.

Park Location

Seminoe State Park
County Road 351
Sinclair, WY 82334
Phone: 307.320.3013


Park Hours:

Visitor Center
– located inside of the main office at North Red Hills
– open May through September Fri-Sat-Sun only

Events & Weddings
Several group sites can be set aside for weddings, receptions and other large functions.



Here is a short YouTube video showcasing several attractions at Seminoe State Park: