parkrun: free weekly community 5k and junior events nationwide

parkrun organises free, weekly community 5k runs (and junior events for children) across hundreds of UK locations; events are volunteer‑led and open to all abilities with no charge to take part. Participants register once online for a personal barcode, then turn up at local events to join for free—no membership or fee is required. Visit the parkrun homepage to register, find nearby events and see event start times and volunteer opportunities.