Based on this roster, there is another Latta who is a sophomore and didn’t race that day. That makes 5 Lattas.
As far as running as a team (if not running for a high school) at NXR…. Here’s an example:
In 2017, Brentwood’s top 6 guys decided not to compete for the high school team due to administrative issues of some kind, so those 6 (including Hasty, Thompson) didn’t compete in high school races, but they did compete as a team at NXR Southeast and took 6th there. They also ran a small intrasquad time trial beforehand.
The rest of Brentwood’s XC roster did compete for the high school team that year.
I would be guessing you still have to either attend a high school (or compete for a high school during the Regular season if homeschooled) in order to compete for NXR as a team, but I honestly have no idea.
To make the Brentwood discussion more relevant to what this thread is about (the girls NXN), here are the speed rating from Aug 24:
Brentwood - 121, 118, 112, 94, 89
Webb School of Knoxville - 140, 135, 132, 95, 93
So no issues with the new Webb School of Knoxville coach so far and they still have a good chance to make NXN. Cardinal Gibbons NC is far ahead of both teams in the TR rankings and their varsity hasn’t raced yet.