When Sir Hugh Munro first classified the 3000ft plus mountains in Scotland, he had no idea of the ways people would find to utilise the list to find a way into the record books. The quickest round, the youngest, the oldest etc etc.
I only became aware quite recently of one of the most remarkable - the most Munros ascended in 24 hours. I came across it on the Scottish Hill Runners excellent website. In 1988 John Broxap did 29 Munros in an incredible 78 mile (33,000 foa). The full list is
Creag a'Mhaim, Druim Shionnach, Aonach air Chrith, Maol Chinn-dearg, Sgurr an Doire Leathain, Sgurr an Lochain, Creag nan Damh, Sgurr na Sgine, The Saddle, Sgurr Fhuaran, Sgurr na Carnach, Sgurr na Ciste Dubh, Saileag, Sgurr a'Bhealaich Dheirg, Aonach Mheadhoin, Ciste Dubh, Beinn Fhada, A'Ghlas-bheinn, Sgurr nan Ceathreamhnan, An Socach, Mullach na Dheirgain, Beinn Fhionnlaidh, Carn Eighe, Mam Sodhail, Mullach Fraoch-choire, A'Chralaig, Sail Chaorainn, Sgurr nan Conbhairean, Carn Ghluasaid
That is an absolutely astonishing list - I can remember how shattered I was after doing the seven on the South Glen Shiel ridge in a day. There are others who have also achieved remarkable totals and the details are here.