Mara Creek, within the Iluka Nature Reserve on the northern side of the Clarence River mouth, is a small, little-known location that is included here mainly for geographic completeness rather than as an established dive destination. The reserve itself is significant for its littoral rainforest, one of the best remaining examples on the NSW coast, and the reefs near the creek mouth are essentially undocumented as a scuba site, more likely explored informally by local residents or bushwalkers wading the shallows than dived with scuba equipment. What can reasonably be expected here, based on the general character of small creek-mouth and rocky-shore habitats on this stretch of coast, is a shallow, tide-influenced environment in the 2-10 m range, likely holding estuarine-influenced species alongside typical rocky-shore reef fish, with visibility governed as much by the tide and recent rainfall as by any ocean conditions.

This is not a site with a car park, dive shop or published guide, and reaching it involves a walk through reserve tracks rather than a straightforward drive-up entry point. Given the almost total absence of documented diving information for this specific location, the details provided here are inferred from the general geography of the Iluka headland and should be treated with considerable caution. Anyone interested in exploring Mara Creek should first check with National Parks and Wildlife Service regarding any access restrictions within the nature reserve, and should seek local knowledge of tide and safety conditions before attempting to dive or snorkel here; the nearby Iluka Bluff and Woody Head reefs, and the well-established Yamba offshore grounds a short drive away, offer far better-documented alternatives for anyone visiting this part of the Clarence Valley coast.

From Iluka township, follow tracks within the Iluka Nature Reserve toward Mara Creek; access involves a walk through littoral rainforest to the creek mouth or adjacent rocky shore. Entry conditions depend heavily on tide and swell, and there is no formal dive-site infrastructure.

This is a small, tide-influenced creek-mouth and rocky-shore location within a nature reserve, so conditions depend on both the tide in Mara Creek and the state of the Clarence River system nearby; entry is only sensible in calm weather and on a rising or high tide.

Enter on a calm day at high tide, explore the shallow rocky sections and creek-mouth habitat at 2-8 m, and exit before the tide turns.

No dive centre operates trips here; visited, if at all, by local residents with strong knowledge of the tide and creek conditions.