Yho, as a South African, I am quite fascinated that the community have not gained more respect for the race that is deemed as the "Ultimate Human Race" aka Comrades Marathon - the world's largest and oldest ultramarathon race.
So many runners to choose from:
Bill Rowan who finisher the first one in 1921 of 08:59 (around 6 mins/km). Forty-eight runners entered the first race in 1921, but only thirty-four elected to start. The course at the time was tarred only for the final few kilometres into Durban. A time limit of 12 hours was set and Bill Rowan became the inaugural winner, clocking 08:59 to win by 41 minutes ahead of Harry Phillips. Of the 34 starters, only 16 completed the race.
Bruce Fordyce as one of the most notorious runners that won Comrades a consecutive 8 times (this will never be broken in my opinion). Also, Jim Walmsley only broke his 50mile record by 14 seconds (not taking anything away from Jim).
Wally Hayward that became the oldest finisher at the age of 80 to finish the Comrades Marathon.
Then you have the current records (this is for a distance between 86 and 93km) - Crazy speeds:
Down: Men: David Gatebe: 5:18:19 (2016) - 3:35 min/km
Women: 5:54:43 (1989) Frith van der Merwe - 4:00/km
Up: Men: 5:24:49 (2008) Leonid Shvetsov - 3:44/km
Women: 6:09:23 (2006) Elena Nurgalieva - 4:16/km
I know everyone is looking more to the 100 milers, but then there is no mention of the Washie100, probably one of the most brutal runs in mid July (winter in SA).
Johann van der Merwe's record of 13:39:45 is also to keep standing for a while.
When looking at the times, you can't just say that Track is faster than Road Running. When looking at ultra distance, all records up until and including 100 km is where Road is faster than Track. Then only the distance makes a difference and that can be imagined as there is a lot less strain on the body going on a flat surface that going up or down.
Yes there are notable records, and Yiannis Kouros is certainly on of the greats, but the only others one I've really noticed and heard of is Camille Heron (setting the 24Hr record at 262 km, and aiming at 280 km in the future), and Johann van der Merwe.
Camille is by far not even close to ending her career and the "Smiling Ultra runner" even holds the record for the fastest marathon dressed as a superhero (female) in 2 hr 48 min 51 sec
Then again Pete Kostelnick is inventing his own ultra marathons and multiday races (holding the record for running across America, or as they call it, fastest coast-to-coast crossing of the United States by foot, in 42 days, six hours and 30 minutes), as well as his insane 5,300-Mile Run From Alaska to Florida (Ke2Key) averaging over 55.3miles (89km - a Comrades) every day for 98 days (97 days, 6 hours, 57 minutes).