The most miles I have been in a 24 hour period was 74, and that was about 4 years ago.
Gotta keep the reason for going 18 miles to myself for now, but it was a good day. I don’t normally go for high mileage like this, no need. My miles mostly are to help me remain healthy. 68 years old here and I have plans to walk for many years, so moderation is key for me.