Have a chance to go to Arizona in March. Any open wheel races in Arizona March 18-20? Thanks.

Try this site:

https://www.racingin.com/track/arizona.aspx

I am at work right now so have no time, but it looks like Canyon Raceway Park has IMCA Mods one of those evenings. Good luck.

Az. Flat Track 1/5mi. Semi Banked Grooved Clay@ Adobe Mtn Speedway N. 43RD Ave/Pinnacle Peak Rd., N/W of I-17/Loop 101-W, in N/W Phx..Sat. Nite Races bout twice a Month Mar.-Oct with a Mid Summer Hot Weather Break!!...
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Brucer'

I don't think I've ever heard the term "grooved" clay. Can anyone elaborate?

kart racing at Phoenix Kart Racing Association on 3/20.
https://www.pkra.com/racing-schedule/
if you wanted to do some racing rather than just attend/watch, I'm happy to connect you with an arrive and drive kart rental option for 206 karts or a Rotax 125. would cost between $400 and $500 for the day (practice, qualifying, heat race, main)

IMCA Modifieds and support divisions at Central Arizona Speedway in Case Grande
IMCA Modifieds and support divisions at Canyon Speedway in Peoria