Murchison River Gorge, River gorge in Kalbarri National Park, Western Australia

Murchison River Gorge is a gorge over 80 kilometres long and up to 129 metres deep, carved by the lower Murchison River from about 13.5 kilometres north-northwest of Ajana to the river mouth at Kalbarri. Its walls expose Tumblagooda sandstone, an Ordovician redbed formation. The Z Bend lookout and The Loop walking trail are among its points of interest.

The gorge was nominated in 1991 as a geological monument for the Register of the National Estate. It lies almost entirely within Kalbarri National Park and is considered to be in excellent condition.

The gorge lies almost entirely within Kalbarri National Park, and its lookouts and trails are managed for visitors there. The Z Bend lookout and The Loop walking trail are the main named points of interest, and the gorge was nominated in 1991 as a geological monument for the Register of the National Estate.

The gorge lies almost entirely within Kalbarri National Park, reached from Ajana in the north or Kalbarri at the river mouth. The Z Bend lookout and The Loop walking trail are the main points of interest. The gorge runs over 80 kilometres, so plan walks around the section you can reach.

The Tumblagooda sandstone is an Ordovician redbed formation, and its fossilised eurypterid tracks near the gorge are among the earliest evidence of land animals. Tracks of other arthropods, possibly trilobites, are also common there. In 1991 the gorge was nominated as a geological monument for the Register of the National Estate.