National Parks Virtual Letterbox #1

This is the first of what we hope to be a series of virtual letterboxes that celebrate America's National Parks. This park has the distinction of being a World Heritage site and a Biosphere Reserve. Yellowstone was the first park to be designated as a National Park. It seems fitting that it is the site of our first letterbox.
Clues are below--good luck and happy hunting
Clues:
1. The highest elevation at over 11 thousand feet is called ________. The mystery word's first letter is the first letter of the second word.
2. Yellowstone is home to the bald eagle, grizzly bear and lynx. These animals are _______. The mystery word's second letter is the fifth letter of this word.
3. The park is larger than Delaware and which other state put together? The mystery word's third letter is the first letter of the second word.
4. Ninety six percent of the park is within which state? The mystery word's fourth letter in the sixth letter of this word.
5. Yellowstone's most notable geothermal feature erupts about every 90 minutes. The mystery word's fifth letter is the fourth letter of the second word.
6. Animals with endangered status who make their home within Yellowstone are the Gray Wolf and the ____________. The mystery word's sixth letter is the fifth letter of the first word.
7. The park is home to a petrified one of these. The mystery word's seventh letter is this word's second letter.
8. There are approximately two thousand of these per year in the park. The mystery word's last two letters are the fourth and eleventh letters of this word.
Use the mystery word to fill in the blank in the web address, http://home.comcast.net/~teamlb/Stamps/mysteryword.htm
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