Page:A Guide to the National Parks of America (1915).djvu/24

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The Yellowstone is the largest and the most interesting geologically of all the national parks of America. Lest this book be open to the charge of partiality, let it be said at the beginning that it takes first place because it is the largest, and that its foremost position in geological interest is due to its geysers and hot springs. It is situated chiefly in North-western Wyoming, but some of it overlaps Montana and Idaho. Its area is 2,142,720 acres, or 3,348 square miles, nearly three times as large as the land and water area of the State of Rhode Island.

The tourist season in the Yellowstone lasts but three months—from June 15 to September 15—a time of year when this region a mile or more up in the sky is at its best, and when, although there are frosts in each month