Two Mile Rocks is one of a handful of small offshore reefs that break up the sandy seafloor off Bargara. Marinelife.org.au describes it as a compact patch of reef about 5 m high and 150 m across, rising from sand in about 15 m of water, 10 minutes by boat from Burnett Heads. That size is its charm: you can circle the whole reef in a single dive, which makes navigation straightforward and lets you spend the dive looking rather than searching.

The reef is built of rock covered in colourful sponges, soft corals and spiky hard corals, with the ledges and undercuts typical of the Bundaberg coast. Being isolated on sand, it concentrates fish – reef fish such as butterflyfish, angelfish, sweetlips and rock cods live on it, and the surrounding sand brings stingrays, shovelnose rays and flathead. Turtles are common along this whole coast. Visibility is usually around 10 m, a little better than the shore sites but far less than the outer reef.

Two Mile Rocks is not a well-documented or regularly guided site – it is mostly dived by locals with their own boats or by Bundaberg Aqua Scuba when the outer marks are unreachable. There are no moorings, so careful anchoring in sand is essential. It is a sensible first boat dive for newly certified divers from Bundaberg and a good option on days when the wind rules out Cochrane Artificial Reef or Evans Patch. Photographers will enjoy the sponge colour; divers looking for dramatic topography or big animals will find more at Hoffman's Rocks or the artificial reef.

Because published information is thin, check the current mark and conditions with the Bundaberg dive shop before heading out.

Launch at the Burnett Heads boat ramp at the Port of Bundaberg (Burnett Heads is 15 km north-east of Bundaberg on Burnett Heads Road; the ramp has a large trailer park and fish-cleaning tables). Clear the Burnett River entrance and run south-east along the coast towards Bargara; the site is about 10 minutes by boat. There are no public moorings, so anchor in sand off the reef edge, never on the coral.

Bundaberg Aqua Scuba can advise on the mark and occasionally runs trips here when it is too rough to reach the outer sites.

Two Mile Rocks is close in and only lightly exposed, but still needs winds under about 15 knots and a small sea for a comfortable small-boat trip out of the Burnett River entrance – the bar can be steep on an ebb tide against a north-easterly. South-east trade winds over 15-20 knots make the anchorage uncomfortable. Visibility is typically about 10 m and drops after rain because of Burnett River outflow; plan around the flood tide for cleaner water.

Winter (May-September) is the most reliable period; summer brings afternoon north-easterly sea breezes and storms, so dive early.

Descend the anchor line to the sand at about 15 m and circumnavigate the reef – at 150 m across it is comfortably done in one dive. Work slowly around the base at 13-15 m, then come up onto the top of the reef at about 10 m for the second half. Return to the anchor line and ascend, with a safety stop on the line.

Bundaberg Aqua Scuba – occasional boat dives from Burnett Heads when weather allows (more often to Cochrane Artificial Reef); otherwise private boat or club charter from the Burnett Heads ramp only.