The Valencia Marathon is one of the fastest marathon courses in the world, with just 12 meters of total elevation change across its entirely flat, urban layout. The course threads through Valencia's historic old town, past the Torres de Serranos and along the lush Turia Gardens, before culminating with one of the most spectacular finish lines in running: a floating walkway over water at the futuristic Ciudad de las Artes y las Ciencias. The warm December weather and electric Spanish crowds have made it a mecca for personal bests.