At this very moment, the competitors of the saintélyon ultratrail are starting from Saint-Étienne for a nocturnal trail run of 75km to Lyon. (Hence the name.) This classic race takes place in the Monts du Lyonnais between the two cities and it is usually very cold, with ice and snow most of the way. The total differential is 1800m D+ / 2100m D-, with a record time of 5:16 last year (and an overall record time of 4:19!)… At least two of my running friends & colleagues, Julyan and Marc, are competing this year, so all the best to them (and the 12 000 other runners) for this ultratrail!
And a few hours later, congratulations to both of them for their finisher status! Bravo!