Racing at Cranbourne has been halted after the discovery of two holes near the finishing post.

The first three races on Tuesday's program were run without incident before a tiring Denhill fell in race four, a 1500m Maiden Plate, and apprentice Nathan Punch landed on the ground.

The Victorian Jockeys' Association said Punch may have suffered a broken collarbone but appeared to escape further injury.

Denhill was uninjured in the incident.

A drainage issue appears to be the cause of the affected area near the winning post.

Cranbourne is scheduled to host another 10 meetings this season, the next a night fixture on March 27.