The mayor of Mont Saint-Michel was fined 10,000 euros ($A12,800) Wednesday for rerouting shuttle services to the French tourist landmark to boost exposure for a series of businesses he owns.
Eric Vannier, 60, was found to have changed the pick-up point for shuttle buses to the famed rocky outcrop with its Gothic-style Benedictine abbey to one located next to a hotel and restaurant he owns.
The move, which took effect in April 2012, forced tourists to walk 900 metres from the main parking lot to the departure point for trips to the picturesque site on France's northwestern coast.
Prosecutors at his trial had attacked the mayor's change as an abuse of his office.
A UNESCO World Heritage site, Mont Saint-Michel is visited by more than 2.5 million tourists per year.