Keyhole State Park, State park in Crook County, Wyoming, US.
Keyhole State Park is a recreation area built around a large reservoir in Wyoming with multiple campgrounds, hiking trails, and outdoor facilities. The grounds feature ten distinct camping areas with hundreds of sites, ranging from basic tent spots to equipped RV parking and cabin rentals.
The area emerged in the 1950s when the federal government built a dam for flood control and water supply purposes. The completed reservoir was later developed into a recreation area open to visitors.
The park draws bird watchers who participate in regular banding activities that track over 200 different bird species throughout the year. These events connect visitors with the natural patterns of migration and seasonal changes that shape life around the reservoir.
The park is accessible year-round, though the best experience comes during warmer months when all facilities are fully operational. Visitors should check ahead to learn which camping areas will be available during their planned visit.
Although the reservoir lies in Wyoming, it delivers most of its water to the neighboring state of South Dakota through an interstate agreement. This unusual arrangement demonstrates how water resources cross political boundaries in this region.
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