- Acadia National Park - Maine
- Arches National Park - Utah
- ✔ Badlands National Park - South Dakota
- Big Bend National Park - Texas
- Biscayne National Park - Florida
- Black Canyon of the Gunnison National Park - Colorado
- Bryce Canyon National Park - Utah
- Canyonlands National Park - Utah
- Capitol Reef National Park - Utah
- Carlsbad Caverns National Park - New Mexico
- Channel Islands National Park - California
- Congaree National Park - South Carolina
- ✔ Crater Lake National Park - Oregon
- Cuyahoga Valley National Park - Ohio
- Death Valley National Park - California/Nevada
- Denali National Park and Preserve - Alaska
- Dry Tortugas National Park - Florida
- Everglades National Park - Florida
- Gates of the Arctic National Park - Alaska
- ✔ Glacier National Park - Montana
- Glacier Bay National Park - Alaska
- ✔ Grand Canyon National Park - Arizona
- ✔ Grand Teton National Park - Wyoming
- Great Basin National Park - Nevada
- Great Sand Dunes National Park - Colorado
- Great Smoky Mountains National Park - North Carolina/Tennessee
- Guadalupe Mountains National Park - Texas
- Haleakala National Park - Hawaii
- Hawaii Volcanoes National Park - Hawaii
- Hot Springs National Park - Arkansas
- Isle Royale National Park - Michigan
- Joshua Tree National Park - California
- Katmai National Park - Alaska
- Kenai Fjords National Park - Alaska
- ✔ Kings Canyon National Park - California
- Kobuk Valley National Park - Alaska
- Lake Clark National Park - Alaska
- Lassen Volcanic National Park - California
- Mammoth Cave National Park - Kentucky
- Mesa Verde National Park - Colorado
- Mount Rainier National Park - Washington
- North Cascades National Park - Washington
- Olympic National Park - Washington
- ✔ Petrified Forest National Park - Arizona
- ✔ Redwood National Park - California
- ✔ Rocky Mountain National Park - Colorado
- Saguaro National Park - Arizona
- ✔ Sequoia National Park - California
- Shenandoah National Park - Virginia
- ✔ Theodore Roosevelt National Park - North Dakota
- Voyageurs National Park - Minnesota
- Wind Cave National Park - South Dakota
- Wrangell-St. Elias National Park - Alaska
- Yellowstone National Park - Idaho, Montana, Wyoming
- ✔ Yosemite National Park - California
- ✔ Zion National Park - Utah
feb 17 2009 ∞
jul 13 2010 +
jul 13 2010 +