Guernsey State Park - United States
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About Guernsey State Park
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Best time to visit Guernsey State Park
Late May through early September is the prime window for RV travel, when warm, dry weather supports boating, swimming, and hiking around Lake Guernsey. July and August deliver the warmest days but also the largest crowds, so RVers seeking quieter sites often target the June and early September shoulder periods. Spring brings strong winds and variable conditions, while late fall and winter see cold temperatures, snow, and reduced services at most facilities.
Cold and snowy; most campgrounds closed, day-use only
Winter conditions; campgrounds closed, day-use only
Snow possible; most campgrounds still closed
Windy with rain and late snow possible; limited camping access
Campgrounds opening for the season; pleasant but variable
Warm with afternoon thunderstorms
Peak season; hottest month with crowds
Hot and dry; popular for boating
Pleasant shoulder season with fewer crowds
Cool nights; some campgrounds begin closing
Cold; campgrounds closed, day-use only
Winter conditions; campgrounds closed, day-use only
Things to do at Guernsey State Park
- Tour the Guernsey Museum EasyRV parking available
The Guernsey Museum, located within Guernsey State Park, is a historic trail-side museum constructed by the Civilian Conservation Corps. The building is made of locally quarried sandstone with a roof of heavy hand-hewn timbers, and inside, exhibit halls and display cases depict eastern Wyoming history and prehistory. nps.gov/articles/wyoming-guernsey-dam.htm
- Visit The Castle Overlook Easy
The Castle is a stone overlook structure perched above Lake Guernsey with sweeping views of the reservoir and surrounding cliffs. Winding stone steps lead up to the overlook for a spectacular view of the lake. Access is via the narrow, historic Skyline Drive, so smaller RVs and tow vehicles are recommended.
- Boating and fishing on Lake Guernsey EasyRV parking available
Lake Guernsey is the centerpiece of the park, offering motorboating, kayaking, paddleboarding, and shoreline fishing. The reservoir was developed as a recreation area around a Bureau of Reclamation dam, and its rugged, cliff-lined shoreline gives boaters a dramatic backdrop. Boat ramps and day-use areas are accessible from the main park road.
- Walk the Oregon Trail Ruts EasyRV parking available
Oregon Trail Ruts State Historic Site, also called the Guernsey Ruts, sits where the historic trails were forced to leave the North Platte River and climb a sandstone ridge; by the time wagon travel ended, ruts five feet deep had been worn into the rock. A short paved path, steep in places, starts at the parking lot, with interpretive signs along the way, plus a small group picnic shelter and a public restroom. nps.gov/places/000/oregon-trail-ruts-state-historic-site.htm
- See Register Cliff EasyRV parking available
Register Cliff is a soft sandstone bluff just south of Guernsey where Oregon Trail emigrants carved their names into the rock. The soft stone made it easy for emigrants to inscribe their names at this trailside landmark. The site has a short, level path from the parking area suitable for most visitors.
- Drive to Fort Laramie National Historic Site EasyRV parking available
Fort Laramie is a major Oregon Trail-era army post and a worthwhile day trip from Guernsey. Originally established as a private fur trading fort in 1834, Fort Laramie evolved into the largest and best-known military post on the Northern Plains. The fort sits roughly 25 miles east of the park along US 26. nps.gov/state/wy/index.htm
- Hike the park's CCC-built trail network ModerateRV parking available
Guernsey State Park preserves a network of historic trails, picnic shelters, and stone structures built during the 1930s. The park's historic district contains 60 contributing buildings, structures, and sites, of which all but a few were the work of the young men of the CCC. Trails wind among juniper-dotted bluffs above the reservoir and connect day-use areas to overlooks.
- Swim at Sandy Beach EasyRV parking available
Sandy Beach is the park's designated swim area along the lake, with a gentle entry suited to families. The shoreline offers shaded picnic spots and access to the reservoir's calm water during summer. Day-use parking accommodates trucks with trailers and smaller RVs.
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Guernsey State Park, WY, United States
How to get to Guernsey State Park
The town of Guernsey is located along US 26, about 100 miles north of Cheyenne, Wyoming, and 66 miles west of Scottsbluff, Nebraska. The park entrance is roughly two miles north of town, with the main approach via US 26 from I-25 at Wheatland (about a 30 mile drive). RV drivers should note narrow, winding interior park roads near the Castle and Skyline Drive, which were built in the 1930s and have tight curves and limited turnarounds best suited to smaller rigs. The closest commercial airport for fly-and-rent travelers is Cheyenne Regional Airport, with Denver International Airport offering more flights about 200 miles to the south.
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