Maratona di Sant'Antonio 
The Official web site of the Marathon which takes place in Padua ...

Maratona di Verona 
Official website of the Verona Marathon... (Site in Italian only)

VeniceMarathon 
Venicemarathon was born to find a "meeting point" between the splendid city and the most ancient sport on earth. The event is certainly a great occasion to see Venice from an unusual point of view and take part to a Marathon.