Good point WD. HS was way longer (time and distance) - went to Wales & (IIRC) Ireland, no biking, ran everything (except I guess the sea).
Just asked Dave Hewitt who immediately responded:
I only know of one previous Corbetts-specific single-take round, that
by Mike Wilson-Roberts in 1992. I corresponded a bit with Mike about
this a few years ago and as I recall he wasn't trying to set any
particularly target time, just to trundle round them all during a
summer. He started with the Brack on 3 March and ended on White Coomb 13 July, so that comes to 133 days all in.
There have been three other continuous Corbett rounds, but they have
all included at least one other hill group as well and hence were much
longer: Craig Caldwell (Munros+Corbetts) 1985/86, Peter Lincoln
(Munros+Corbetts+Grahams) 1997/98, and a rather mysterious massive
effort by Andrew Allum in 1996/97 taking in M+C+G plus Donalds and
also E+W 2000ers.
So MG has nearly halved MWR's time.
I'm not sure how Symonds' Munros and Gorman's Corbetts compare side by side. I remember that Hugh Symonds took 67 days for the Munros, doing them entirely on foot, whereas Manny Gorman has taken 70 days for the Corbetts, making use of bikes for roads and forest tracks.
I suspect the distance required to complete the Corbetts is far greater than the Munros, but don't have any stats to hand. But you only need to look at a map to see that the Corbetts are far more scattered than the Munros.
Clearly Hugh Symonds' run was legendary in that he carried on down to England, Wales and Ireland. Nobody was ever going to repeat that kind of crazy adventure.
corbetts run must be significantly harder than the munros. a very well done to manny. A really drawn out test of endurance, both physical and mental.