The Comet River is a river in Central Queensland which rises in the Expedition Range, north of Expedition National Park and south of Rolleston. It then flows north through Comet towards a confluence with the Nogoa River, where they both form the Mackenzie River.
The Brown River is one of a number of tributaries and the Comet River Weir is the main water storage facility on the river. In the late 1990s the river was the site for a proposed new dam, although it was never built.
Coordinates: 23°34′S 148°32′E / 23.567°S 148.533°E / -23.567; 148.533