Vic mountain biker missing for two nights

A search will resume at first light on Monday for a mountain biker missing for a second night in a Victorian park.

Police, including the air wing, and SES crews spent Sunday looking for the 47-year-old man without luck.

The Montmorency man left his car at the Smiths Gully General Store in Smiths Gully on Saturday afternoon and took off on his bike.

He planned to ride for about five hours but the alarm was raised when he failed to return on Saturday night.