Cowwarr Weir Camping Area sits on Rainbow Creek, a breakaway section of the Thomson River near the small township of Cowwarr in Victoria's Gippsland region.

The weir itself is a concrete gravity structure with steel spillway gates that regulates water supply to the Macalister Irrigation District, with the breakaway creek course having formed during a major 1952 flood.

The camping area is a popular base for paddlers, as Cowwarr Weir marks the downstream take-out for canoe and kayak trips along the Thomson River from Bruntons Bridge — a stretch known for grade 2–3 rapids, a gorge section, and wave trains.

During warmer months the weir pool also draws canoeing and paddleboarding enthusiasts. Telstra mobile reception is generally reliable at the site, though Optus coverage can be inconsistent.

Dogs are permitted but must be kept on a leash, and visitors should check for any current Blue-Green Algae warnings before arrival.