The Thorofare is a 2.5-mile slow-moving channel connecting the lower and upper lakes of Lake Coeur d'Alene. This artificial reef site features a shallow, sandy bottom with submerged logs that provide habitat for aquatic plants and local fish. Divers and snorkellers can expect depths between 1 and 3 metres, with an average of 2 metres. Visibility is generally good, ranging from 10 to 30 metres. The site is suitable for beginners, though water temperatures can be dangerously cold during spring runoff. Summer surface temperatures typically reach 15 to 21 degrees Celsius. Entry is possible from both shore and boat, and the channel maintains a strict no-wake rule.

Eightmile Island in Lake Coeur d'Alene offers a freshwater snorkel experience centred around historic structures. Snorkelers can explore the shallow waters near the Vinther-Nelson cabin area, where old dock structures provide points of interest. Access to this site requires a boat, as it is located approximately 12,875 metres from the shore. Conditions are generally suitable for intermediate snorkelers, with visibility ranging from 10 to 30 metres and mild currents. Water temperatures are cold, typically reaching 16 to 22 degrees Celsius during the summer months. Divers and snorkelers should remain aware of boat traffic in the area. Facilities available include parking, toilets, showers, a rinse station, and boat charter services.

Sandy Point is a freshwater site located on the largest island of Priest Lake. This reef-like environment features a rocky perimeter with a gently sloping beach, reaching depths of 1 to 5 metres with an average of 3 metres. Visibility is generally good, ranging from 15 to 30 metres. Access to the site requires a boat, as it is situated 500 metres from the shore. The water is cold, with surface temperatures varying between 5°C in spring and 22°C in summer, and divers should be aware of thermoclines and boat traffic. The site is suitable for beginners and offers a 4/5 rating for snorkelling.

Bartoo Island is a freshwater dive site situated mid-lake in Lake Coeur d'Alene. The eastern side, near the Sunrise group site, features underwater rock formations and submerged timber. Access to this site requires a boat, as it is located approximately 9656 metres from the shore. Divers should expect mild currents and depths starting from 1 metre. As a mountain-fed lake, water temperatures are cold, ranging from 4-8°C in April to 16-22°C at the surface during summer. A wetsuit is recommended for comfort and safety. Hazards include cold water and potential entanglement in submerged timber. The site is suitable for intermediate divers and offers good conditions for snorkelling.