Here's a place I found near Minneapolis, MN. They have two locations and I visited the Burnsville location.
According to the timing sheet, the track is 250m long. The best I could do was 0:23.440.
The track feels much shorter that the track in Toronto. It is slicker, too, so you need to be more careful with the throttle even when the tires have warmed up. The fastest part of the track has a kink to the left that tended to cause a little bit of oversteer just as you get to the braking area for a very tight right turn. Lots of fun.
Three eight-minute sessions cost $52 + $2 for the balaclava to use their helmet. You get a timing sheet after each session that shows times for each lap, times plotted on a graph, and track info.