If you ask any hunter who spends time hunting in the West, almost all could tell you about the seasonal big game movement patterns they see in the field. We have long recognized that mule deer, elk, and pronghorn take advantage of the vast landscape to seek the best forage and habitat conditions to help them survive the harsh environment. Anecdotally, we have known for years that big game migrate, but the advent of new, real-time GPS tracking collars along with a modeling technique to predict preferred pathways has shed new light on the needs of our western big game animals.