Not a lot of details about the outdoor track on the website. Although it looks like it's more of a basher style track and not so much used for official racing like something at Tacoma RC raceway. Can I run something like a traxxas UDR there?

UDR might be a little big, but certainly can drive it there. More suited for 1/10, and 1/8.

Yes, I have seen people there with type of truck

So it sounds like there's very little restrictions on the outdoor dirt track. Sweet. Obviously keep it within reason, not going to bring a fifth scale Losi in there @ 40 lbs

If you want to yeah run it I've seen guys running all different stuff including nitro.