Per their Facebook page:
Tri-City Raceway Park has been bitten by the weather bug yet again! Even with three built-in rain dates for “The Mudslinger”—originally scheduled for Saturday, April 7th—it seems General Manager Chad Wagner and crew just can’t catch a break.
A high probability of rain in the weekend forecast has forced Tri-City Raceway Park to postpone the scheduled rain dates of April 14 and 15. Determined not to cancel the opener, Tri-City will try once again to wave the green flag on “The Mudslinger” on Sunday, April 29, 2018.