RE: Question on competive 426@428 racing?
Yes, you can race outside of your district.
NMPRA is the recognized AMA "special interest group" for pylon racing. But, you don't have to be a member to race. I am, but that's because I chose to support them.
There are lots of local race groups - SEMPRA (southeast), WIPRO, (wisconsin, I think) - and others around the country. Mostly they're groups of folks that have rules tailored to suit the fields and people around that area. Some folks fly Q500's with engines up to 0.46 rather than .40, etc.
You don't have to qualify. I would suggest if you've never raced before to start out with 424 (Q500 airframe, no composite airframes, Thunder Tiger pro .40 engine, APC 9-6 prop) or maybe even some local "club 40" or Quickee 25 - (q500 airframes, .25 engines) to get started.
You might ask at the local hobby shops, etc, if they know of a group of guys that are racing in the area.
I live near Kansas City. We have typically 6 races within a 4 hour drive each summer. 2 in Wichita, 2 in Kansas City, and 2 in Hillsdale, KS. The Hillsdale race is August 13th, I believe. Wichita and KCRC will be after that, I'll have to go check actual dates. We fly 424, lately have been adding 426, and might even dabble in EF1 (electric formula 1) this fall.