Doug Scott was part of the famous team to complete the challenge in 1975.
He also founded the charity Community Action Nepal (CAN) in 1994 to help people in the Himalayas, and had raised thousands of pounds in lockdown by climbing up and down his stairs.
Nottingham-born Mr Scott, who had cancer, died at his home in Caldbeck, in the Lake District.
On 24 September 1975, expedition leader Chris Bonington reported Dougal Haston and Mr Scott, part of an 18-strong group, had reached the 29,028ft (8,848m) summit safely and were on their way down the mountain.
