Snow has fallen in the upper reaches of Yellowstone and Glacier national parks, and fall weather in general is making a national park trip in the northern half of the United States not terribly appealing.

October is a season of transition across the National Park System. Cooler, and in some cases colder, weather is sweeping across the northern states, while southern states are not as blazingly hot as they were just a month or two ago. But school is in session throughout the country, so if your vacation plans are tied to school, you're probably not heading anywhere now for an extended trip.

Which makes it the perfect time to start considering where you might want to go next year. Here in the U.S. you don't need to limit your choices to the National Park System. Canada is just a short drive, or flight, away. Rebecca Latson, Traveler's contributing photographer and columnist, just returned from a trip to the Canadian Rockies, and is here to discuss what she found and what you might consider.