Racewalking:

​​Heather Lee is in her 90's and a racewalker champion who lives in Australia.

Heather Lee.com.au World Record Athlete and Champion fundraiser

 

Competitive Walking:

​Centurions1911 Race Walking at its best
The Long Distance Walkers Association
New England Walkers Race Walking
​Race Walk Learn to race walk it's a sport for everyone
The Australian Centurions
​United States Centurion ​Walkers 100 miles 24 hours​
​USATF Oregon Race Walking
​World Class Racewalking

Articles Information about Racewalking:

Racewalking for Beginners by Kristen Battles-Burden Nov 2013 (nhmagazine.com)
​The 50Km racewalk is secretly the Olympics' most brutal event  SB Nation by Rodger Sherman Aug 20, 2016