The Munros of Scotland are mountains with a height over 3,000 feet (914 metres) that are on the official list of Munros as kept by the Scottish Mountaineering Club (SMC). There is no explicit topological prominence requirement.
There are currently 282 Munros as defined by the SMC. 'Munro bagging' is the activity of climbing all the listed Munros, and as of 2 July 2020, 6,768 people have reported completions. The first continuous round was completed by Hamish Brown in 1974, and the record as of January 2021 is held by Donnie Campbell.
The distance figure of 1,422km above was the distance Donnie Campbell ran and walked in his continuous completion in 2020. Added to this was 1,443km of cycling and a further amount of kayaking. A complete self-powered Munro round therefore entails approximately 3,000km of self-powered travel, but the majority of time is spent on foot.
A history of Munro Round records can be found on this Wikipedia page.