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Historical Features - GUERNSEY

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Historical Features  - GUERNSEY 


Guernsey State Park is a registered national historic landmark. The park has long been known as a haven for camping, boating and hiking, but its real treasure may lie in the wonderful work completed by the Civilian Conservation Corps that can be seen throughout the park. CCC projects like the “Castle,” the Guernsey Museum, historic picnic shelters, unique drinking fountains, trails, bridges and more are a must see at Guernsey State Park.


  • Historic features can be found throughout the park.
  • The “Museum”, picnic shelters at Sitting Bull, Red Cloud, Spotted Tail day use/campgrounds can all be seen on the east side of the reservoir off of Lake Side Drive.
  • Unique structures like the “Castle”, the “Million Dollar Biffy”, Brimmer Point Scenic Overlook and miles of hiking trails can all be found on the west side of the park.
  • The Guernsey Museum is open seasonally from May 1st through September 30th.
  • All other historic features and attractions are available for use throughout the year.

Appropriate SPHS&T daily use permits are required on all vehicles entering Guernsey State Park.




Site Status



Reclamation Announces End of Season Operation of Guernsey Reservoir


  • Bureau of Reclamation will begin drawing down Guernsey Reservoir on the evening of Monday, September 11th.
  • The boat ramps will slowly become unuseable.
  • Reclamation advises all watercraft be removed by September 13th. 

Glendo and Guernsey state parks have banned open fires until further notice. Click here to find out more!

Only propane cooking appliances can be used. 


The annual Guernsey Reservoir silt run will begin the evening of July 4 and the boat ramps are expected to no longer be usable by July 8.

Guernsey State Park is open all year.



  • Guernsey State Park is open all year. Since we do have overnight camping the park is open 24 hours per day with the appropriate permits.
  • The Guernsey Museum is a seasonal facility that is open from May 1st through September 30. Visitors may visit the Museum between the hours of 9:00a.m. - 5:00p.m..

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