Clark Rock

Clark Rock is a natural rocky reef dive site located just outside Departure Bay in Nanaimo, British Columbia, a short boat ride of roughly 12–15 minutes from the Brechin Boat Launch. The site is one of Nanaimo's well-known natural reef dives and is frequently paired as a second dive after the nearby wrecks when conditions allow longer travel.

The reef is a boulder pile that rises gradually from the sand, with the shallowest point near the top of the structure and the base of the reef touching sand at around 65–70 feet (roughly 20 metres), consistent with a maximum depth of 20.6 m. Most dives begin on a mooring line that leads down to a large concrete mooring block on the bottom, with a guide line running from there to the reef itself. The terrain features ledges, cracks, and boulders, and the perimeter of the reef is easy to navigate by following the reef edge or circling around it.

Clark Rock holds a consistently high number of wolf eels, with 6–10 commonly seen per dive tucked into cracks, holes, and between boulders, or occasionally spotted out in the open hunting. Giant Pacific octopus den under boulders and in crevices throughout the site. Rockfish species present include quillbacks, coppers, and occasional tiger rockfish. Lingcod cruise the structure, and schools of pile perch and striped perch are regularly encountered. Steller and California sea lions are known to make fly-bys mid-water, particularly in fall and winter.