Jeannie Rice with a 98.7% age grade half marathon at the 2019 Naples Half: 1:38:41 @ 70 years old. She's a marathon world record holder too. 💪

Apparently she was going for the WR, pretty close. About a minute off.
https://www.naplesnews.com/story/sports/2019/01/16/jeannie-rice-goes-half-marathon-world-record-naples/2591858002/Elliott Mason took a photo with her. She looked *crazy strong* for 70.
"In August, Rice set the Masters American record in the mile, winning the USA Track and Field Masters 1 Mile Championships in Michigan. Her time of 6 minutes, 38 seconds was more than two minutes faster than the previous record.
A few weeks later in September, Rice beat the national record for her age group in the 5-kilometer distance in Naples at the Gulf Coast Runners Labor Day 5K. However, her time of 21:38 is not an official record because the course was not certified by the USATF.
The highlight of the year came in Chicago in October. Not only did Rice run a marathon faster than any woman 70 years old or older in history, but she breezed past the previous world record. Rice finished the Chicago Marathon in 3:27:50 to break the record by more than six minutes."
a local beast I know that took a photo with her:

an interview with her from a few years ago:
http://www.benrose.org/MythBusters/mb_Rice.cfm

beast.