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Gray Reef Reservoir

Alcova, Wyoming · Natrona County

Gray Reef Dam, Glendo Unit, PSMBP, is on the North Platte River about 27 miles southwest of Casper, Wyoming and 2 miles downstream from Alcova Dam. Although the reservoir has a total capacity of 1,800 acre-feet with a surface area of 182 acres, under its prescribed function as a reregulating reservoir, the water surfac…

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About Gray Reef Reservoir

Gray Reef Dam, Glendo Unit, PSMBP, is on the North Platte River about 27 miles southwest of Casper, Wyoming and 2 miles downstream from Alcova Dam. Although the reservoir has a total capacity of 1,800 acre-feet with a surface area of 182 acres, under its prescribed function as a reregulating reservoir, the water surface elevation of Gray Reef fluctuates widely from nearly full to nearly empty on a daily basis. Therefore, fish are not stocked in the reservoir. A barrier-free fishing pier, restroom and primitive campground are located below the dam. Canoes and other small watercraft may be launched from the campground. Available species include brown trout, cutthroat trout, rainbow trout, and walleye. Rainbow and cutthroat are stocked in the river below Gray Reef Dam. A boat ramp and parking lot are located one-half mile downstream of the dam. Current Reservoir Levels

Plan Your Visit to Gray Reef Reservoir

Heading to Gray Reef Reservoir? A few things to know before you go:

  • Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
  • Fees: day-use and camping fees vary; check current rates on the official park page
  • Trash & pack-out: follow Leave No Trace principles
  • Wildlife: store food in bear boxes where provided; never feed wildlife
  • Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

Frequently Asked Questions

Do I need a reservation for Gray Reef Reservoir?

No central reservation system listed for Gray Reef Reservoir. Check the official page (https://www.recreation.gov/recarea/1238) for the latest entry policy and availability.

How do I get to Gray Reef Reservoir?

Access is from U.S. 220 via County Road 412.

How do I contact Gray Reef Reservoir?

You can reach the park at phone: 307-235-9325 or email: GPwebmaster@gp.usbr.gov.