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.

Alcàsser will close out the calendar with a charity race and walk, both starting from Plaza del Castell.

The festive event features two laps of an urban circuit, fancy dress and a charitable partnership.

Badalona will round off the year with 5K and 10K races; the announced date is Dec. 27.

Barx is preparing its year-end mountain event, although several course details are still awaiting confirmation.

Two days of community sport in Tinajo brought together adult races, a children’s event and a walking route.

The charity event is scheduled for Dec. 26; key details for participants have yet to be announced.

Oropesa del Mar will hold its year-end community race on Dec. 27; start times and registration details are still pending.

The Castellón event has a date, while key details about entry and the course remain unconfirmed.

The race is scheduled for Dec. 26, but start times, route and registration details have yet to be confirmed.

The Canyelles event has a confirmed date, while its route, start time and registration details are still pending.

The Castelldefels festive race returns on Dec. 27, although some route details are still awaiting confirmation.

The Murcia trail event returns Saturday, Dec. 26, with a start in central Pliego and a mountain-running distance.