Ikramul Hasan Shakil, a mountain climber and a UNDP youth advocate, on Monday set a new Guinness World Record by crossing the longest distance at the quickest possible time to summit Mount Everest.

He beats Tim Macartney-Snape, the first sea level to Everest climber, by 100 kilometres and six days.

His journey is also extraordinary as he sought to raise climate awareness by completing his journey on foot.

Around 3pm Monday, his team published a facebook post confirming his safe return from the summit.

On 25 February, Shakil began walking from Inani beach, Cox’s Bazar to reach the top of the world’s tallest peak in 90 days. Afterwards, he traversed through Bangladesh, India and Nepal, and completed his journey in 84 days.

UNDP Resident Representative Stefan Liller, among others, joined Shakil’s “flag-off ceremony” to witness the start of a “historic journey,” as per a UNDP news release.

At the sea level, Shakil crossed 1,300 kilometres from Inani beach to the Everest Base Camp. Later, he climbed 29,031 feet to reach the peak.