<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Happymi:
Does anyone know if Yellowstone would be too risky to be traveling in October? </div></BLOCKQUOTE>
Read the NPS's website about Yellowstone,
Operating Hours and Seasons.
For any National Park, you can go to the NPS's website and read through their "Plan Your Visit" section to get all kinds of informaiton. The NPS website uses the first four letters in the park's name for the URL, so for Yellowstone, it would be
www.nps.gov/yell/. For parks with two words in their name, such as Grand Teton, use the first two letters of each name,
www.nps.gov/grte/.