Custer Cove is a freshwater site located in Glendo Reservoir, United States. The shoreline features a mix of shale and clay shelves that transition into a sandy beach. Underwater, the transition zones between the rocky substrate and sandy areas provide habitat for local fish. Snorkelling here is suitable for beginners, though conditions vary due to the cold water temperatures, which can range from 4 to 10 degrees Celsius. Deeper sections of the reservoir are colder and may contain thermoclines. Access is via the shore, and the site includes toilet facilities. Snorkellers should remain aware of boat traffic in the area.

Reno Cove at the low water ramp area in Glendo Reservoir offers a rocky shoreline that remains accessible even during periods of significantly low water levels. The site features submerged structures near the old river channel, providing a distinct topography for exploration. Divers and snorkellers should note that conditions vary, with depths starting at one metre and extending into the channel. Access is available via both shore and boat entries. Due to the potential for cold water temperatures in spring and autumn, divers should monitor their time in the water to avoid hypothermia. The site is suited for advanced skill levels, and users must remain vigilant regarding boat traffic and surge.

Burnt Wagon is a remote freshwater snorkel site in Glendo Reservoir, United States. Accessible via a hike from the northern end of Sandy Beach, the site is isolated from motorized vessels, which contributes to its water conditions. Snorkellers should be prepared for cold water temperatures, which measure approximately 4°C (40°F) in early April. The site is suited for intermediate snorkellers due to hazards including cold water, potential entanglement, and low visibility. Toilets are available at the site. Given the challenging conditions and cold temperatures, appropriate thermal protection is necessary for those visiting this location.