My husband and his family are from MT, so over the years, I’ve visited a few different cities, due to my in-laws moving for various personal reasons: Yaak, Libby, and Seely Lake.
In the interest of full disclosure, I’m a very prissy city girl born and raised in L.A., so while Montana is not one of my favorite places, I can see it’s appeal. Most of the cities I’ve visited in MT are picturesque and unspoiled. My mother in law is a huge fishing fan and she swears the best fishing is in Libby, with Yaak being the runner up. She and my husband are big fans of Horseshoe Lake in Libby, MT. The water is extremely clear and there are tire swings and the like to use to jump into the water. We used inflatable kayaks as well, the last time I visited. Riding 4 wheelers and dirt bikes through the city is another popular activity during my visits - it’s fun for pretty much all ages. Gold panning and picking huckleberries are also amongst some of my MIL’s favorite things to do in MT. Note that nearly all of my experience in MT has been from the smaller, more rural cities; my MIL currently lives in Kalispell, the biggest city she’s ever lived in, but she absolutely hates it, so I’ve yet to visit her there.
Anyway, my MIL is a huge fan of MT. She’s even tried living in other states to be closer to various family members that have since moved out of MT, but she’s never lasted more than a year - she just ends up missing the cost of living, weather, trees, clean air, and unspoiled environment of MT. She says she feels closer to God in Montana. So she’d agree with you that Montana is an amazing state, OP.