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Boysen State Park

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About Our Site - Boysen State Park


The first white men through the Wind River Canyon were the Ashley Fur Party in 1825. The original dam was built by Asmus Boysen in 1908, for whom the park and reservoir are named. Part of the original dam can still be seen adjacent to the tunnels on the Lower Wind River Campground. Mr. Boysen also built a 710kW power plant at the site. Operations ceased when in 1923 a major flood filled the plant with silt.

The CB&O Railroad went through the canyon in 1911 and the state highway went through in 1925. The existing dam was completed in 1951. Boysen became a state park in 1956.

Original-Boysen-Dam-SiteLower-Wind-River-CampgroundOriginal Asmus Boysen Dam Site Located just north of the Lower Wind River Campground. This site also represents the park's northern boundary.


Boysen State Park Wild West Winter Carnival on the Horizon


             Fishermen of all ages are encouraged to get ready for the Boysen State Park Wild West Winter Carnival, January 19-21.

            Compete for cash prizes by catching the largest Trout, Walleye, Ling, Perch or Crappie. Registration is $10 per person. Anglers must have a derby registration at weigh-in.

            Weigh-in begins at 8 a.m. on Friday and ends at noon on Sunday. The weigh-in station is B & K Shoreline Stop. Awards will be presented at 2 p.m. Sunday also at the B & K Shoreline Stop.

            Anglers are reminded to obey Wyoming Game and Fish Department rules and regulations and to adhere to safe ice fishing practices.

            Sponsors of the event are: Nick’s Welding; B & K Shoreline Stop; Ameri-Gas; Central Bank and Trust; Pepsi; Riverton Rocky Mountain Discount Sports; Canyon Fish Taxidermy; Boysen Lake Marina; Inberg Miller; Lucky Five Lounge; Liquor Shed; JCC Enterprises LLC; Jim Miller, Cheyenne; Industrial Linings; Sportsman’s Warehouse; Fast Lane; North Platte Walleye Unlimited; and Boysen State Park.

            For more information, please call Kathy Blair at 307-259-7486.


Wyoming State Parks, Historic Sites & Trails
A Division of Wyoming State Parks & Cultural Resources
2301 Central Avenue, 4th Floor, Cheyenne, WY 82002




More Information - Boysen State Park



Facts and Figures
  • Current Dam
  • Structural height: 216 feet
  • Crest Length: 1,100 feet
  • Type: rolled earth, rock-fill
  • Volume of material: 1,700,000 cubic yards
  • Spillway capacity: 20,000 cubic feet/seconds
  • Power plant: 15,000 kw

Reservoir and park

  • Water: 19,560 acres
  • Shoreline: 76 miles
  • Length: 20 miles
  • Widest point: 5.5 miles
  • Land: 15,145

Believe it or not…

Yes! Contrary to what your eyes tell you, the Wind River flows NORTH!




Site Status


 We are open! Please view our hours below to find a good time to visit!




Grounds open all year - 24 hours.


Park grounds are open year-round, weather permitting.

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