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.

The San Sebastián event features a 5K, a mass-participation 10K and a sub-45 race beside Zurriola beach.

El Puerto adds a 10K to its January event, with a confirmed date, planned course changes and announced runner services.

Donostia’s December 31 race lists 7.9 kilometers and a 2 p.m. start, with entry and course details still to be confirmed.

Santurtzi's 15 km race returns on November 29, with an 11 a.m. start and registration open until the previous day.

Cehegín hosts trail races and hikes on November 28, with routes from 11 to 53 kilometers and entry fees starting at €32.

Colón welcomes 5K and 10K runners for a charity event supporting people affected by road traffic accidents.

Elvas and Badajoz will be linked on November 15 by a half marathon starting in Portugal and finishing in Spain.

Marchena and Paradas race in November, with 400 planned entries, a 9:30 a.m. start and some course details still outstanding.

Three distances in an Andean setting: confirmed details of November’s race near Chimborazo.

Galifa's race weekend features a mountain run and a walk, with 800 metres of climbing and separate start times.

Valleaguado hosts a charity event for runners and walkers, with no compulsory distance or requirement to complete 24 hours.

Aranda's 40th cross-country edition has a date. Start times, distances and entry arrangements remain unconfirmed.