| National Park | State | Greg Visited? |
|---|---|---|
| Acadia | Maine | X |
| American Samoa † | American Samoa | |
| Arches | Utah | X |
| Badlands | South Dakota | |
| Big Bend | Texas | |
| Biscayne | Florida | |
| Black Canyon of the Gunnison | Colorado | |
| Bryce Canyon | Utah | X |
| Canyonlands | Utah | X |
| Capitol Reef | Utah | X |
| Carlsbad Caverns | New Mexico | |
| Channel Islands † | California | |
| Congaree | South Carolina | |
| Crater Lake | Oregon | X |
| Cuyahoga Valley | Ohio | |
| Death Valley | California | |
| Denali | Alaska | X |
| Dry Tortugas † | Florida | |
| Everglades | Florida | X |
| Gates of the Arctic † | Alaska | X |
| Gateway Arch | Missouri | X |
| Glacier | Montana | |
| Glacier Bay † | Alaska | |
| Grand Canyon | Arizona | X |
| Grand Teton | Wyoming | |
| Great Basin | Nevada | |
| Great Sand Dunes | Colorado | |
| Great Smoky Mountains | Tennessee | X |
| Guadalupe Mountains | Texas | |
| Haleakala | Hawaii | X |
| Hawai'i Volcanoes | Hawaii | |
| Hot Springs | Arkansas | |
| Indiana Dunes | Indiana | |
| Isle Royale † | Michigan | |
| Joshua Tree | California | |
| Katmai † | Alaska | |
| Kenai Fjords | Alaska | |
| Kings Canyon | California | |
| Kobuk Valley † | Alaska | |
| Lake Clark † | Alaska | |
| Lassen Volcanic | California | |
| Mammoth Cave | Kentucky | |
| Mesa Verde | Colorado | X |
| Mount Rainier | Washington | X |
| New River Gorge | West Virginia | |
| North Cascades | Washington | X |
| Olympic | Washington | X |
| Petrified Forest | Arizona | |
| Pinnacles | California | |
| Redwood | California | X |
| Rocky Mountain | Colorado | |
| Saguaro | Arizona | |
| Sequoia | California | |
| Shenandoah | Virginia | X |
| Theodore Roosevelt | North Dakota | |
| Virgin Islands | US Virgin Islands | |
| Voyageurs | Minnesota | |
| White Sands | New Mexico | |
| Wind Cave | South Dakota | |
| Wrangell-St. Elias | Alaska | |
| Yellowstone | Wyoming | X |
| Yosemite | California | |
| Zion | Utah | X |
So I've visited National Parks in total, or % of them.
Many others I've been very near to, but I'm only counting the ones which I've actually been to and/or seen directly.
† No direct road access to the park itself. These are reached only by boat, ferry, foot, or aircraft. A few (Biscayne, Voyageurs, American Samoa) have a drivable visitor center, but seeing the park directly may require another means of access. May be viewable by nearby roads, beaches, mountains, etc.