If you're new to Billings, here's something you should know. The Rimrocks and associated parks along Highway 3 are closed for 24 hours, beginning at 5 AM on July 4th.
Disc golf has come a very long way in Montana over the last couple of decades. There are disc golf courses all over the state along with events and tournaments in just about every town. You can even (legit) play disc golf in some Montana State Parks.
Some very interesting research is being done at The University of Montana when it comes to traumatic brain injury (TBI). The research will be particularly helpful for veterans, but in reality will assist anyone impacted by TBI.