One of the great things about snowshoeing in Montana is: you won't run out of places to do it. Just about anywhere you can hike or mountain bike in summer, you can snowshoe in winter. Nordic trails are another good bet, but be polite. Don't destroy groomed cross-country trails with your snowshoes; stay a few paces away from the groomed tracks and nordic skiers will surely smile as they skate by.
Snowshoeing, one of the fastest growing winter sports, has made giant strides (if you'll pardon the pun) in recent years. It has at least three great advantages: 1) The basic technology is amazing: you're buoyant on the snow with light extensions of your feet. You become a non-motorized all-terrain vehicle. 2) You don't need to sacrifice your life savings to buy equipment; and 3) It's easy.
If you're a snowshoeing neophyte, there's no need to bite your nails. Snowshoeing is probably one of the few sports in the world that don't have a steep learning curve. Basically, if you can put one foot in front of the other, you're well on your way to having some fun with snowshoes.
Get out and snowshoe with outdoor educators in Montana's Flathead Valley. Glacier National Park and other local naturalists annually lead public outings in different locations around the valley.