Garrison Dam Tailrace is a freshwater site offering a unique environment for advanced divers and snorkelers. The water originates from the bottom of Lake Sakakawea, resulting in consistently cold temperatures that range from 0°C to 15.5°C. Divers should expect moderate currents and visibility between 3 and 6 metres. Depths at the site reach up to 9 metres. Access is via a shore entry. Due to the nature of the tailrace, hazards include boat traffic, strong currents, and low visibility. Facilities available at the site include parking, toilets, and showers.

Government Bay is a freshwater dive site defined by dramatic sandstone and mudstone cliffs that extend underwater to form vertical structures and drop-offs. The site reaches depths of 55 metres, with an average depth of 13 metres. Divers can access the water from the shore or by boat. Conditions vary, with mild currents and potential thermoclines. Water temperatures fluctuate significantly, ranging from 2.7°C in early spring to 27°C during summer months. Due to the cold water, hypothermia is a risk, and divers should be prepared for varying visibility and potential boat traffic in the area. The site is suited for intermediate divers.

Indian Hills in Good Bear Bay offers a freshwater snorkeling experience defined by rugged points and underwater shelves. The site features varied depth contours and drop-offs suitable for intermediate snorkelers. Access is available via both shore and boat. Conditions vary, with water temperatures reaching 20°C during the July to August swimming season, while April temperatures remain very cold between 0.5°C and 3.3°C. Divers and snorkelers should be aware of potential hazards, including boat traffic, cold water, and low visibility. Facilities at the site include parking, toilets, and showers.