The Melba Gully State Park was formed to protect a small pocket of natural temperate rainforest in the Otway Ranges near Apollo Bay, Victoria, Australia.

The 48-hectare (120-acre) park is extremely valuable as one of the few pockets of natural old-growth Otway Ranges rainforests to survive the logging and subsequent fires, making it a key part of the regeneration of the original Otway Ranges rainforests.

The gully has a dense cover of myrtle beech (Nothofagus cunninghamii), blackwood (Acacia melanoxylon) and tree-ferns, with an understorey of low ferns and mosses.

Glow worms (Arachnocampa otwayensis),[2] which are the bioluminescent larvae of small flies known as fungus gnats, can be seen at night along the stream banks and walking tracks.

[1][3][4] The park has few facilities due to its small size, but it has a picnic ground and basic picnic facilities, with the main attraction being the 35 minute Madsens Track Nature Walk.