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.

A festive race through vineyards and winery cellars, with the date confirmed and course details still to be clarified.

Logroño will host the race on Dec. 20; the course and registration details are still to be confirmed.

The event is listed for December in Fuente del Rey, but key details about the route and participation are still missing.

December brings Algeciras an urban race with a festive atmosphere, youth events and support for a local charity campaign.

Proaza hosts two days of mountain running, with a main race, a vertical climb and options for young runners and walkers.

Mou-te per l'esclerosi múltiple, 20 December 2026 at the Circuit de Barcelona-Catalunya: 5 and 10 km run, cycling, skating and a mile. Times and prices.

A festive mountain race near Colldejou combines several distances, challenging trails and a winter atmosphere.

The Cádiz-area event is set for a Sunday and lists two distances, while start times, the course and entry fees remain unconfirmed.

Calles’ year-end trail race has a date, while the route, schedule and entry conditions still need to be announced.

Jaén hosts an 18-kilometre popular race in December, combining dirt tracks and asphalt with start and finish at La Salobreja.

The Alava race returns in December with a Mendizorrotza start, an urban course and fees that rise by registration period.

Pinto hosts two distances, age-group awards and a festive day of community running in December.