A Barcelona tradition to bid farewell to the year
For more than a quarter of a century the B100 Cursa dels Nassos has been the most festive way to say goodbye to the year in Barcelona. Inspired by the figure of the “Home dels Nassos”, a character from Catalan folklore who appears on 31 December with as many noses as there are days left in the year, the race invites thousands of runners to close the season with a fast course and an athletic party in the heart of the city. The 2025 edition arrives stronger than ever and promises to break participation and performance records.
What makes the 2025 edition special?
Barcelona City Council and B100 The Healthy Banking, the main sponsor, have confirmed that the Cursa dels Nassos 2025 is close to selling out. With one month to go, registrations are running ahead of previous years and organisers expect to reach 13 000 participants, which would make the race one of the largest 10 K events in Spain. The 2025 programme repeats the two distances of recent editions: a 10 K mass race open to runners of all levels and an international 5 K reserved for elite athletes, a race that has produced four world records in the past four years.
The event will start on Wednesday, 31 December 2025 in the Sant Martí district. The 10 K start is scheduled for 5:15 pm, while the 5 K will take place earlier in the afternoon on a certified, flat and very fast circuit. The organisers have indicated that the popular course retains its start and finish in Carrer de Selva de Mar and runs along Barcelona’s seafront, passing landmarks such as Passeig de Garcia Faria, Pla de Palau and Avinguda Icària before returning to the starting neighbourhood. The almost flat profile helps both amateurs and elites to run fast.
Training and a free macro‑session
The proximity of the race doesn’t mean you can’t improve your preparation. The organisers have arranged weekly training sessions open to all levels during November and December. In addition, on Tuesday, 9 December at 7 pm, a free macro‑training session will be held at the La Mar Bella sports complex, featuring national coaches and Olympic and Paralympic athletes to advise participants. Registration is free and available on the event’s official website.
ALS Sport: new technical sponsor and official T‑shirt
One of the innovations for 2025 is the arrival of ALS Sport as official technical sponsor. The brand, specialising in running and trail gear, will supply the race’s official T‑shirt, designed and produced entirely in‑house to maximise breathability and comfort. The collaboration with the Cursa dels Nassos marks the start of ALS Sport’s expansion in Catalonia and will allow thousands of runners to enjoy its high‑quality kit.
Tips for tackling the final 10 K or 5 K of the year
With only a few weeks to go, it’s still possible to optimise your performance with specific sessions. Here are some tips to arrive in shape for the Cursa dels Nassos:
- Quality workouts: include short and long intervals at race pace to improve speed and tolerance to effort. For example, 5×1 km at 10 K pace with two‑minute recovery or 8×500 m at 5 K pace.
- Don’t neglect aerobic volume: two easy runs of 8‑12 km per week build your aerobic base.
- Work on strength and core: squats, lunges and planks improve stability and prevent injury.
- Mind your nutrition and hydration: ensure adequate carbohydrate intake in the week leading up to the race and practise your fuelling strategy on long runs.
- Reduce the load in the final week: a progressive taper helps you arrive fresh. Cut your mileage by 30‑40 % while keeping a few light intensity sessions.
If you are competing in the elite 5 K, it’s advisable to train at threshold pace. First‑timers in the 10 K can divide the race into three parts: start under control, settle into goal pace in the middle, then save energy for the final two kilometres.
How to register and extra services
Registration must be completed via the event’s official website. The entry fee includes a technical T‑shirt, race pack, timing chip, refreshments and access to the cloakroom. Organisers also provide free public transport on race day, physiotherapy, massages at the finish, pacers and other services such as parking and showers.
Remember to pick up your bib and official T‑shirt in the days before the event at the designated points (usually the Fira de Barcelona or La Mar Bella). Bring identification and verify your registration details.
Reasons not to miss it
- Festive atmosphere: end the year running through the streets of Barcelona with music, cheering crowds and a unique celebratory feel.
- Fast course: the flat profile and certified circuit make it easier to set personal bests and enjoy the Mediterranean scenery.
- Record participation: be part of one of Spain’s biggest 10 Ks with 13 000 runners celebrating sport together.
- World‑record opportunities: the 5 K attracts some of the world’s best distance runners and has already witnessed multiple world records.
In short, the B100 Cursa dels Nassos 2025 is a must‑do event for any runner. Whether you’re chasing a personal best, soaking up a unique atmosphere or making your debut in a popular race, the last day of the year invites you to finish 2025 on a high. Are you ready to welcome 2026 on the run?