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.

Date, route, schedule and logistics for a mountain race linking Tamaimo and Arguayo in Tenerife.

Two laps through the town centre, a 10:30 a.m. start and a €15 entry fee: the key details of January’s race.

The Teruel race returns for its 11th edition on a winter evening, with two distances and a start in the town centre.

Monachil’s winter race combines snow, darkness and high mountain terrain; its entries sold out soon after registration opened.

Two routes, an early start and paths beside the Gaià shape this winter event in Altafulla.

Cantimpalos opens Segovia’s running calendar with two distances, a course through streets and meadows, and children’s races.

Cantoria has a date for its 2027 mountain race, but the route and registration details are still pending.

Three laps, minimal elevation and tiered fees: the key details of this January race in Cantabria.

The popular Sant Antoni race will return to Barcelona in late January, while details of the next edition remain to be confirmed.

A popular race in Camós is scheduled for February, but key practical details have yet to be released.

Castelló will host its historic 21-kilometer race in January, with a morning start and a certified city course.

The race returns to Xàtiva at the end of January, but key details about the event are still to come.