The Diary extends a warm congratulatory hand and a warmer can of Ralgex to all those who had a stab at the 26.2-mile course.
Space won't permit a full roll-call of adland's runners, but our respect goes out to Richard Pierson, a Bartle Bogle Hegarty account director, who ran 3.52. Sophie Lewis, the BBH board business director, wasn't far behind at 4.17.
Well done, too, to Carl Hillary, the BJK&E broadcast manager, who finished in 3.55, just behind his colleague Tim Howlett, the BJK&E business development director (3.51).
The Mother strategist Andy Bellass came in at 4.28, just ahead of Chris Kay, the managing director of Fallon's Happen arm, who crossed the line in 4.35. Both were pipped by Sophie Stewart, from Abbott Mead Vickers' The Lab, who finished in 4.27.
Finally, it's clear what Ben Langdon's been doing on his gardening leave from Euro RSCG London-he finished in 3.46. The Diary is suitably impressed.