There's a 95 year old lady in Sydney called Heather Lea. She is running out of people to compete with in her age group, for fast races. She is my hero.

https://www.bodyandsoul.com.au/fitness/workouts/try-not-to-cry-reading-about-92yearold-heather-walking-300km-for-her-late-husband/news-story/fc0ad15e664ed566bc73e66971330a9f