From the Black Hills National Forest to the Badlands National Park, South Dakota is home to some stunning natural oases that have been recognized by the entire country for their beauty, but luckily our state is also home to some gems that only locals know about. Nestled near the southwestern corner of the state is the 4,407-acre Angostura Reservoir, which is home to some of the state’s best swimming destinations.

With a surface elevation of 3,127 feet and a maximum depth of 75 feet (the average depth is just 29 feet), the Angostura Reservoir was created in 1949 after the construction of the Angostura Dam for irrigation by the United States Bureau of Reclamation.

Angostura and Sheps Canyon Recreation Areas/Facebook

This beautiful reservoir is not only one of the only large bodies of water in the area, but it is also an important location for migratory birds and supports populations of walleye, northern pike, smallmouth bass, and sunfish.

Kim Z/TripAdvisor

It’s a popular destination for boating, camping, hiking, and fishing, but by far, our favorite activity here is swimming. Boasting 36 miles of shoreline and some of the best sandy beaches in the entire state, the Angostura Recreation Area is easily one of our favorite swimming destinations.

Angostura and Sheps Canyon Recreation Areas/Facebook

While many people flock to the reservoir’s most popular beaches — including Breakers Beach — we love heading off the beaten path to discover the small, sandy beaches you’ll likely have all to yourself.

Angostura and Sheps Canyon Recreation Areas/Facebook

You’ll discover a variety of picturesque sandy beaches along the shore of Angostura Reservoir, and there’s truly no better way to spend a warm, sunny South Dakota afternoon.

Angostura and Sheps Canyon Recreation Areas/Facebook

Why not make a weekend of it? The Angostura Recreation Area is home to 169 campsites that cost just $15 per night for non-electrical sites, and $19 for electrical sites. You can also enjoy paved trails, excellent fishing opportunities, and even rent a kayak.

Angostura and Sheps Canyon Recreation Areas/Facebook

If you’re looking to get away from it all if only for the afternoon, head on over to the Angostura Reservoir, where you’re sure to find the perfect place to build a sandcastle and splash around in the crystal clear, cool waters.

Angostura and Sheps Canyon Recreation Areas/Facebook

Address: Northeast Fall River, SD 57747

Angostura and Sheps Canyon Recreation Areas/Facebook

Kim Z/TripAdvisor

Have you ever been to the beautiful, off the beaten path Angostura Reservoir before? Where is your favorite place to make a splash during South Dakota’s few warm months? Share your opinions and experiences with us in the comments below!

OnlyInYourState may earn compensation through affiliate links in this article.