Who is the youngest person to walk the national 3 peaks?

As of my last update, the youngest person to complete the National Three Peaks Challenge is believed to be a boy named Sam Wainwright, who accomplished the feat at the age of 8 in 2015. The challenge involves climbing the three highest peaks in Scotland, England, and Wales—Ben Nevis, Scafell Pike, and Snowdon—within 24 hours. However, it's always advisable to check the latest records, as new achievements may have occurred since then.