Oliver Smith, 9, completed a 380K run to raise over £17,000 for The Brain Tumour Charity. He ran the equivalent of nine marathons in four months, covering 3.3K daily. Oliver's father was diagnosed with a brain tumor in 2025.

Oliver ran parkruns, junior parkruns, and sessions with the Wakefield Junior Triathlon Club. He did not run a marathon, as British athletics prohibits children under 11 from doing so. His efforts have inspired many, including local MPs and Parliament. Read more culture coverage.

Oliver's fundraising target was £2,000, but he raised £14,949.96. He plans another 380K challenge over the summer, aiming for £20,000. His ultimate goal is to become an Olympic triathlete. Related: Spotify Running Mode Defaults to 150 BPM, Below Most Runners' Cadence.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.