Claudia:
I'm on FEDERAL grand jury. there are only 3 in Montana. Missoula,(500 miles) Great Falls,(325 miles) & Billings (145 miles)Everybody east of Billings is in that pool. I have a person on my jury panel from Sidney Montana and has to drive 265 miles one way. I feel lucky because I could have been picked for FEDERAL trial jury. That also lasts a year and you have to call every Friday to see if you need to be there Monday morning at 8:00 am. At least with grand jury you know it is the 3rd Wednesday of the month every month.
We do have DISTRICT court located here in Town.
I have been on it 2 times. You are part of the jury pool for a year, and may do a number of trials if selected. I also was selected for district Court 2 times when I lived in Colorado Springs. There it was 6 months and if selected as a juror you were done after the trial was over.
This is because of size of jury pool. When you don't have as many people around you have to hang onto them longer.