Montana in the Fall is a must see. The air is just starting to get crisp in the morning, and yet it warms up in the afternoon. The trees are changing color and they look magnificent against a mountain backdrop. The fish are still biting at the Lake and the nearby rivers and creeks are good fishing too. The grasses are tall and just turning color. They wave gracefully in the wind. The birds are just starting their flights south for the winter. The vacation crowds are less heavy, yet many of the activities that were available in the summer are still available in the Fall. Among the locals it is a favorite time of year. Typically, the leaves start changing in late September at at their peak close to the 2nd week of October and are gone with the first snowfall, usually around Halloween. Fall weather: Temperatures change dramatically during the day from very warm to very cool, but are still very comfortable to be in the outdoors. Click on an image to enlarge.