From Dan Stewart (A.K.A. Race Nut) (former Midwest Dirt Track Facts website). Dan does post on 4m as well.
It takes the website a few minutes to load.
Midwest Dirt Tracks Facts - https://www.midwestdirttrackfacts.com/
UMP DIRTcar Summer Nationals History and all 103 of the tracks that have been a part of the tour.
https://i.imgur.com/9Anckoe.jpg