Road America has been a big part of Walthers' personal life, too. During high school and college, Walthers and his wife Judy, 76, would come to the track together, even when she moved to Racine.

Road America is at N7390 State 67. For tickets, camping information and more, go to roadamerica.com or call 920-365-7223. Children 16 and younger are admitted free with a paying adult.

MotoAmerica Superbikes will race at Road America in Elkhart Lake from May 30 to June 1. Six classes of motorcycles will compete, including Superbike, Supersport and King of the Baggers.