It's impossible to keep up with the rapid growth rate in websites dedicated to or associated with the sport of racewalking. The following list should be seen as a representative sample of what's out there rather than as a definitive list. I welcome any new additions - email me at firstname.lastname@example.org and I will add your site.
Hey, this is not a walking site but is shows what can be done in a
sporting context. Definitely one of the most comprehensive sites for
beginners in a sport that I have seen - and it is triathlon -
compliments of Tracy, Lucas and Avery at https://slccn.org/.