In SoCal, 5 minute drive from the Otay Mesa Border Crossing.
Raced a 1979 KX 80 on Wednesday nights. Bad race track lighting and deep ruts made it hard for a ten year old.
Taking (2-3) friends, (all under the age of twelve) along to race their bikes as well without their parents.
I feel like somewhere there has to be a track where a Riverside type race could be duplicated. The desert spots that are closed to access these days are gone but a modern day Riverside type race still seems feasible.