BTT Challenge Maratón Atzeneta

The BTT Challenge Maratón Atzeneta is a marathon-distance mountain bike race held in Atzeneta del Maestrat in the inland Castelló province of the Valencian Community. From 2026 onwards it forms part of the new I Circuito de BTT Castelló, which merges the former Challenge BTT Maratón and Circuito BTT Muntanyes de Castelló series under the Diputació de Castelló. The Atzeneta round runs through the rugged terrain of the Maestrat mountains.