Rightly Opinionated

I've read that there are waves of Monarch Butterflies that fly through that Horsetooth Mountain area in October each year. Millions of these butterflies fly up to three thousand miles from Canada to Mexico through this area. The trip takes them 2 months. They huddle together as they are cold. In the spring, they begin their return to Mexico the second week of March. There are no other butterflies that fly that far.