By 1913, he had ascended Pillar Rock in the English Lake District, with no assistance, by what is now known as "Mallory's Route"-currently graded Hard Very Severe 5a (American grading 5.9).
Mallory participated in the initial 1921 British Reconnaissance Expedition,[REF] organised and financed by the Mount Everest Committee, that explored routes up to the North Col of Mount Everest.