Dredge Cuts Swim Beach is a freshwater site located at Fort Peck Lake, created during the construction of the dam. This site features sandy shorelines and shallow water, with depths ranging from 1 to 5 metres and an average of 2 metres. It is suitable for beginners and offers shore access. Conditions include mild currents, though visitors should be aware of boat traffic, cold water temperatures, and deep areas. Water temperatures vary significantly, starting at 3°C in early April and warming to 23°C by July. Facilities at the site include parking and toilets.

Fort Peck Dam Tailwaters offers a challenging freshwater diving and snorkelling experience in the United States. Located near Fort Peck Lake, the site features depths ranging from 30 to 40 metres. Divers and snorkellers must contend with strong currents and cold water temperatures, which typically average 12.2°C and reach a maximum of 17.0°C. Due to these demanding conditions, the site is suited for advanced divers. Access is available via both shore and boat entries. On-site facilities include parking, toilets, and showers to support visitors. The site is noted for its distinct water conditions compared to the main reservoir.

Hell Creek State Park offers shore access to the waters of Fort Peck Lake. The site features rocky points and finger bays, providing a varied topography for snorkelers. Depths across the area range from the surface to 67 metres, with an average depth of 23 metres. Conditions are variable, with mild currents and low visibility possible depending on wind and reservoir levels. The swimming season typically runs from July to August, when water temperatures average 20.4 degrees Celsius. Facilities available at the site include parking, toilets, and showers. This location is suited for intermediate snorkelers.