Meet up with Montana Linux people on IRC. We currently gather at the #ubuntu-montana room on the freenode network. Stop in and say "hello" or even ask/answer some questions. Don't have to be a Ubuntu user either. Or use the web-based chat client.
BillingsLUG
The BillingsLUG hasn't had a meeting in a while but they are hoping to start back up real soon. Really.
BozemanLUG
The BozemanLUG meets on the FIRST Thursday of the month at 7PM
MSU-Bozeman
EPS Building, Rm 259
Bozeman, MT
Used to be the LAST Thursday, but we changed it.