Lizard Rock is opposite the turn-off to Ellery Creek Bighole.
Ellery Creek was named by explorer Ernest Giles in 1872 in honour of a Voctroian astronomer. In the 1880s Ellery Creek Homestead was built south of the gorge, and in the 1950s and 60s Ansett operated a chalet near the gorge. Both are now gone.
A word of warning, the water temperature gets colder with the depth of the water, so don't dive deeply.
ADDITIONAL READING