
Flavius Challenge OCR
The Flavius Challenge OCR is Portugal’s leading urban obstacle course race, celebrating its 7th edition in the historic city of Chaves on September 6–7, 2025. Organized by Wildfun in partnership with the municipality and the Portuguese OCR Federation, it offers two distances — 12km and 3km — across two days.
The long course (12km) is part of the 2025 OCR Portugal League and Cup, and serves as a qualifier for the 2026 European OCR Championships in Spain. Athletes face 30+ natural and artificial obstacles on Saturday and 15 on Sunday, ranging from climbs and carries to water crossings.
With categories for Elite, Competitive, and Fun (non-competitive with burpee penalties), the event is inclusive yet challenging, welcoming participants aged 12+ with a supportive, high-energy atmosphere.