OnCodines Trail is a team-based charity challenge that celebrates its 6th edition on 18 April 2026. The route links Castellterçol with Sant Feliu de Codines and offers three options: a 100 km race and two walk/run options of 62 km. The aim is to reach 350 teams entered and raise at least €300,000 in donations for the Fundació Oncovallès, the Institut Guttmann and the Fundació Enriqueta Villavecchia. It also includes "La Petita OnCodines Trail", a children’s challenge for teams aged 7 to 15 and families. The event combines sport and solidarity in a natural setting. Teams can choose to walk or run, and each one commits to raising a minimum donation. The OnCodines Trail has the support of 15 municipalities, the Diputació de Barcelona and is organised by the Centre Excursionista Sant Feliu.
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