Castellón will host a fast 10-kilometer race in February alongside its marathon, with some details still to be confirmed.
Two distances, a Penyeta Roja start and entry fees that rise before the December race.
Castellón hosts the 60 km and 106 km races on April 24. The date is confirmed, while further race details remain pending.
Castellón hosts a UCI race with 157 km, 2,200 m and a ticket to the World Championships for the best in each group.
The Grao event will bring together sprint, Olympic, supersprint, and family duathlon with prices, schedules, and key services.
The Castellón stage retains a flat route, high pace, and a very central start next to El Corte Inglés.