South Muddy Campground
The campground is open for the 2026 season. Boysen State Park campgrounds operate on a reservation-only system from May 15 through September 15. Outside this window, sites are first-come, first-served. Reservations available via reserve.wyoming.gov or by calling 877-996-7275.
Flood Watch issued July 21 at 12:59PM MDT until July 23 at 6:00AM MDT by NWS Riverton WY
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central, north central, northwest, south central, southwest, and west central Wyoming, including the following areas, in central Wyoming, Casper Mountain, Green Mountains and Rattlesnake Range, Lander Foothills, Natrona County Lower Elevations, Owl Creek and Bridger Mountains, Southwest Bighorn Basin, Upper Wind River Basin, Wind River Basin, Wind River Mountains East and Wind River Mountains West. In north central Wyoming, Bighorn Mountains Southeast, Bighorn Mountains West, Northeast Johnson County, Southeast Bighorn Basin and Southeast Johnson County. In northwest Wyoming, Absaroka Mountains, Cody Foothills, Jackson Hole, North Bighorn Basin, Teton and Gros Ventre Mountains and Yellowstone National Park. In south central Wyoming, East Sweetwater County, Flaming Gorge and Rock Springs and Green River. In southwest Wyoming, South Lincoln County. In west central Wyoming, Salt River and Wyoming Ranges, Star Valley, Upper Green River Basin and Upper Green River Basin Foothills. * WHEN...Until late Wednesday night. The most likely period of possible flooding is Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Slow moving showers and thunderstorms and abnormally high moisture in the air can bring locally heavy rainfall that could lead to flooding. - http://www.weather.gov/safety/flood
About
South Muddy Campground is located on the west side of Boysen Reservoir within Boysen State Park, Wyoming's largest state park. It is part of West Shoreline Loop 1, which encompasses several small camping areas including Fremont Bay, Libby Point, and Sandy Hills Loop, with approximately 20 total campsites distributed among them. The campground provides direct lake access, a boat launching area, a reservable group shelter, picnic shelters, and level camping spots with some shade trees. A sandy beach nearby offers swimming opportunities. As a primitive camping area, South Muddy has no hookups (no electric, water, or sewer connections at sites). Vault toilets serve the area, and a dump station is available at the park headquarters. Boysen Reservoir is a popular destination for fishing, boating, and water recreation in central Wyoming near Shoshoni. The park sits at the northern edge of the Wind River Canyon with dramatic scenery. Campers should be prepared for exposed conditions and bring their own drinking water if the park's water systems are seasonal.
Directions
From Shoshoni, Wyoming, head north on US-20 toward Thermopolis. After crossing the Wind River, turn left toward the west shoreline areas. South Muddy Campground is located on West Shoreline Loop 1 on the western side of Boysen Reservoir.
Amenities
| Water | — |
| Fires Allowed | Yes |
| Toilets | Yes |
| Dump Station | Yes |
| Wifi | No |
| Pets Allowed | Yes |
| Showers | No |
| Electric Hookups | — |
| Water Hookups | — |
| Sewer Hookups | — |
| Camp Store | Yes |
| Price | $10 |
Vehicle
| Max RV Length | 60ft |
| Max Trailer Length | — |
| Big Rig Friendly | Yes |
| Pull Through Sites | No |
Contact
| Phone | +1 (307) 876-2796 |
Cell Service
| AT&T | Yes |
| Verizon | Yes |
| T-Mobile | None |
Availability
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