Hiking gives you the added bonus of moderate to strenuous cardiovascular exercise while you're seeing the sights. Remember, though, that these are the mountains, and the elevation you gain over the course of the hike is a much better indication of how difficult the hike will be than the actual distance traveled. Be sure to wear comfortable hiking shoes that have been broken in, and if you plan on hiking in prime grizzly country, be sure to carry bear mace and check with rangers for what to do in case you actually see a bear. Best place to take a hike in Montana: Glacier National Park. In Wyoming: the Wind River Mountains or Bighorn Mountains.
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