Find the best calendar of popular races, marathons, half marathons, and 10K events. Dates, registrations, and all the details for your big challenge, right here.

Santander summons runners on May 10 with 21, 10, and 5 kilometers, start at Pereda and a seaside atmosphere.

Dates, venues, routes and fees for the great Balearic triathlon that kicks off the season with three distances and a coastal setting.

The Islantilla event brought together swimming, cycling, and running by the sea in a tourist enclave turned into a sporting showcase.

Caravaca de la Cruz hosts a mountain race with several distances, a demanding elevation gain, and a strong popular and social following.

The Alfacar race returns with several distances, full services, and a strong charitable component.

Distances, schedules, prices, and key rules for the Montsant event, with all the useful information for runners and hikers.

Dates, routes, prices, and services for an event that combines triathlon, island, and logistics in Fornells.

Terrassa hosts an urban and charitable 5K with a start at Parc dels Catalans and support for Oncolliga.

Date, route, start and key points of the race in Fuerteventura, with everything useful to follow it closely.

Platja d’Aro concentrates triathlon and aquabike in various formats, with fast courses and a highly attractive setting.

The Rioja race combines three distances, starting at the Espolón, and a very complete organization for runners.

Date, fees, sprint format, and all the essential details of the Almeria race in Vera, with useful and up-to-date context.