Glendo State Park, State park in southeastern Wyoming, United States

Glendo State Park is a large natural area in southeastern Wyoming featuring a sprawling reservoir, rolling terrain, and forested areas along the North Platte River. The park offers boat launching facilities, numerous campgrounds, and trails for visitors to explore.

The park was established in 1959 following construction of Glendo Dam by the federal government for irrigation and flood control purposes. The dam created the reservoir that made this recreational area possible.

The name Glendo comes from the nearby town, and the reservoir's west side has wide sand beaches with dunes where tent camping is allowed on a two-kilometre stretch. Tipi rings left by Arapaho, Cheyenne and later Oglala and Brulé Sioux can still be found in and around the park, though many traces now lie under the reservoir.

The park is accessible with multiple areas for boat launching and plenty of camping options spread throughout the grounds. Arriving early, especially on weekends and during peak seasons, helps secure good spots for activities.

The reservoir is home mainly to perch, walleye and catfish, while trout and catfish live in the river above it. Several fish of record size have been caught here. The Glendo Dam that created the lake is 639 m long and 58 m high, and its power plant's two Francis turbines produce up to 38 MW from a maximum flow of 370 m³ per second.