Bureau of Reclamation, Wyoming.
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
Effective immediately, Reclamation will require all boats launching at Lake Berryessa to participate in a seal program to prevent the spread of invasive mussels. All vessels wishing to launch at Lake Berryessa will be inspected. A red quarantine seal will be applied for 30 days during, which the vessel will not be permitted to launch. Vessels that have finished the 30-day quarantine may return to the lake and have the seal removed by authorized staff and will be allowed to launch. For more information on this updated protocol, please view the press release here: https://www.usbr.gov/newsroom/news-release/5031.
Access is from U.S. 220 via County Road 412.