Where to park in Nice for the Nice Côte d'Azur by UTMB?

The organizers say it clearly: parking in Nice is very complicated; it’s best to avoid it. Opt for the train (TGV Paris–Nice in 6 hours, Marseille–Nice in 2h40) with a direct arrival in the city center. If driving is unavoidable, rely on carpooling and park in a park-and-ride lot on the outskirts, with limited capacity. Parking is just as challenging as the elevation gain of this trail.