Brest Bay in the Detroit River features submerged rock piles and ridges that provide vertical structure for divers and snorkellers. This freshwater site consists of both natural and artificial reef formations at depths of 3 to 5 metres. Access is strictly by boat, and the site is suited for intermediate divers due to variable conditions. Visibility typically ranges from 3 to 10 metres, with mild currents present. Water temperatures fluctuate significantly throughout the year, ranging from 1C in winter to 25C in July. Divers should remain aware of boat traffic and the risks associated with cold water, particularly outside of the summer months.

Bolles Harbor Dike is an artificial reef formed by man-made rock structures protecting the harbor entrance. The site offers depths ranging from 3 to 8 metres, with an average of 6 metres. Snorkelers can explore the edge of these rock dikes, which provide a habitat for various freshwater fish. Conditions are variable, with visibility ranging from 1 to 15 metres and mild currents present. Due to the presence of boat traffic, snorkelers should exercise caution. The site is suitable for intermediate snorkelers, with water temperatures reaching comfortable levels between June and September.

Luna Pier Public Beach, located on the Detroit River, offers shore access to a crescent-shaped pier and sandy beach. Snorkelers can explore the rock embankments flanking the pier, which provide structure for the site. Depths at this location range from 1 to 5 metres, with an average of 3 metres. Conditions vary significantly, with visibility ranging from 1 to 60 metres and currents that can be moderate to strong. Hazards include cold water, rip currents, and surf. The site is suitable for beginners, though the cold water temperatures require caution. Facilities available at the beach include parking, toilets, and showers.

Bar Point Shoal is a rocky shoal located at the mouth of the Detroit River. This site features a rugged lake bottom at depths ranging from 2 to 7 metres, with an average depth of 4 metres. Access is by boat only, as the site is situated 3,240 metres from the shore. Conditions at this location are variable, with moderate currents and visibility typically between 2 and 5 metres. Due to the presence of boat traffic, cold water temperatures, and strong currents, this site is suited for intermediate snorkelers. Water temperatures fluctuate significantly throughout the year, ranging from 1°C in winter to 25°C in July.

White Sands is located at the southern tip of Boblo Island where the Detroit River meets Lake Erie. This site features a man-made white sand beach and a combination of natural and artificial reef structures. Snorkellers can explore depths ranging from 5 to 15 metres, with an average depth of 10 metres. Access is strictly by boat, as shore entry is not possible. Conditions include mild currents and visibility typically between 2 and 5 metres. Water temperatures fluctuate significantly throughout the year, ranging from 1 to 25 degrees Celsius. Due to the presence of boat traffic and potential entanglement hazards, this site is best suited for intermediate-level snorkellers.

Holiday Beach is a popular shore-entry snorkeling site located along the Lake Erie shoreline near Rondeau and Erieau. The site features a long sandy beach with a shallow, sandy bottom, making it suitable for beginners. Water temperatures fluctuate significantly throughout the year, ranging from 1C in winter months to 25C in July. Divers and snorkellers should be aware of variable conditions, including potential rip currents, surf, surge, and periods of low visibility. On-site facilities include parking, toilets, showers, and changing rooms to support visitors.

Elizabeth Park is a muck dive site located in the Detroit River, suitable only for advanced divers. The site features depths ranging from 2 to 9 metres and is accessed via the shore. Divers should be prepared for strong currents, low visibility, and potential hazards including boat traffic and entanglement. Due to these challenging conditions, specialized equipment and training for river diving are required. The site offers opportunities to search for historical items such as old bottles. Facilities at the park include parking, toilets, and showers. Water temperatures fluctuate significantly throughout the year, ranging from 1 degree Celsius in winter to 23 degrees Celsius in July.

K. Walter Ranta Memorial Park serves as a public shore access point along the Detroit River in Amherstburg. The site features a rocky shoreline that allows for shallow-water exploration of the riverbed. Conditions are variable, with water temperatures ranging from 1°C to 25°C throughout the year. Due to the nature of the river environment and cold water temperatures, this site is rated for intermediate snorkelers. Parking is available for visitors. Divers and snorkelers should be prepared for cold water hazards when entering the river.