Three-year-old Jaxon Krzysik has become the youngest person to walk up the three highest peaks in the UK – all in memory of his best friend, Ralph Rowlands, who died aged two after suffering brain damage in 2017. /VCG Photo

The nursery pupil, from Burnley, a town in Lancashire, England, took on the Three Peaks Challenge with his father Cal Krzysik, 29. They managed to summit Scafell Pike, in England's Lake District National Park, Ben Nevis, in Scotland, and Snowdon, in Wales. /VCG Photo

Jaxon completed the final peak on June 22 and altogether managed to walk 37 kilometers (23 mi) and climb 3,064 meters (10,052 ft) worth of mountainous trails. "He loves his mountains, he loves rocks, he likes climbing on rocks,” the father told The Telegraph. /VCG Photo

Aside from setting new records, Jaxon raised more than 1,300 U.S. dollars for Cerebra, a charity that helps brain-injured children including Jaxon’s friend Ralph and his family. "It’s an incredible way to pay tribute to him. For someone so young to do something so amazing is fantastic," said Ralph's mother, who burst into tears when she found out what Jaxon was doing for her son. /VCG Photo