Epso is a shore-entry freshwater reef dive located in the Brockville and Thousand Islands region. This site features shallow, calm water, providing a suitable environment for beginners to practice buoyancy control and navigation. Conditions can be variable, so divers should check local reports before entry. The site consists of an artificial reef structure; divers should exercise caution to avoid sharp edges or entanglement and maintain neutral buoyancy to prevent contact with the structure. As a freshwater habitat, the site supports a variety of temperate freshwater fish and invertebrates typical of the region. Divers should arrive self-sufficient as facilities are unconfirmed.

Lock 28 in Brockville and Thousand Islands is a freshwater drift dive suitable for beginners. The site features the Wee Hawk wreck near the entry point, from which divers drift downstream toward the Conestoga wreck. The maximum depth is 2 metres. Divers should be prepared for moderate currents and cold water temperatures. Due to the nature of the site, entanglement risks and boat traffic are present, requiring careful navigation. The habitat supports various temperate freshwater fish and invertebrates typical of the region. Access is via a shore entry, allowing for a straightforward start to the drift along the lock system.