35th Annual Woodburn Mopar Nationals

Soren said
Probably, because that's when the rain starts.

It would be interesting to look at maybe the last 10 years of weather after Labor Day and see what it really is.

I don't know why, but Woodburn seems hotter than any other track around there. A 100 degree day at Yakima isn't as bad as a 90 degree day at WB.