1. La Vuelta a España: The Vuelta a España is one of the three Grand Tours in professional cycling, alongside the Tour de France and Giro d’Italia. The race typically includes several stages in the Costa Blanca region, and it takes place in August and September each year.
2. Gran Fondo Alberto Contador: This is a popular road cycling event named after former professional cyclist Alberto Contador. The event takes place in late September, and it offers riders the chance to tackle challenging routes with stunning coastal and mountain scenery.
3. Costa Blanca Bike Race: This is a three-day mountain bike stage race that takes place in January. The event attracts professional and amateur mountain bikers from around the world, and it offers a challenging route through the mountains and forests of the Costa Blanca.
4. Valencia Bike Race: This is a road cycling race that takes place in February and covers over 700 kilometers through the Costa Blanca region. The race attracts top professional cyclists from around the world, and it offers spectators the chance to see some of the best riders in action.
5. Mallorca 312: Although technically not in the Costa Blanca, this famous cycling event takes place on the nearby island of Mallorca and attracts many cyclists from the region. It offers a challenging route of 312 kilometers with over 5,000 meters of elevation gain, and it takes place in April or May each year.

These are just a few of the most famous cycling events in the Costa Blanca region. There are also many other smaller events and races throughout the year, making the region a great destination for cycling enthusiasts of all levels.