I'll be heading to Des Moines, IA to watch the US Championships and after looking at the entry list, North Dakota should be well represented. Here is what I found:
Juniors-
Kira Larson-HJ
Laura Roesler- 800
Ellie Grooters- 400 IM
US Championships
Laura Janeszewsi- 800
Whitney Calrson- LJ
Heather Zander- Hept (provisional)
Toni Tollefson- HJ (provisional)
I am sure that Milbrath and Barnes have run fast enough, but I could not find them on the list of entrants.