I was a little ambiguous there. It was a 24 hour race around a 1.5 mi loop. I completed 105 miles in a combination of walking/running, probably about a 50/50 split between the two. Stopped only to use the restroom and for shoe/sock changes. The race supplied food and drink.

I've also completed 12 hour races (I get to around 62 miles/100 km), and I've done distance races of 50 miles and 100 miles. My best time for 100 miles is 23 hours, but folks complete this distance much faster, say 14:23:13:

http://umstead100.org/index.html

http://www.devonyanko.com/news/2022/4/8/umstead-100-race-rep...

I don't know if there are 24-hour racewalking competitions, but 100 mile racewalks are a thing:

https://en.wikipedia.org/wiki/Centurion_(racewalking)