| Letter | National Parks | % Correct |
|---|---|---|
| D | Death Valley | Denali | Dry Tortugas | 100%
|
| G | Gates of the Arctic | Gateway Arch | Glacier | Glacier Bay | Grand Canyon | Grand Teton | Great Basin | Great Sand Dunes | Great Smoky Mountains | Guadalupe Mountains | 100%
|
| A | Acadia | American Samoa | Arches | 95%
|
| B | Badlands | Big Bend | Biscayne | Black Canyon of the Gunnison | Bryce Canyon | 95%
|
| C | Canyonlands | Capitol Reef | Carlsbad Caverns | Channel Islands | Congaree | Crater Lake | Cuyahoga Valley | 95%
|
| Y | Yellowstone | Yosemite | 95%
|
| E | Everglades | 89%
|
| R | Redwood | Rocky Mountain | 89%
|
| Z | Zion | 89%
|
| H | Haleakalā | Hawaiʻi Volcanoes | Hot Springs | 84%
|
| O | Olympic | 84%
|
| J | Joshua Tree | 79%
|
| S | Saguaro | Sequoia | Shenandoah | 79%
|
| M | Mammoth Cave | Mesa Verde | Mount Rainier | 74%
|
| I | Indiana Dunes | Isle Royale | 68%
|
| K | Katmai | Kenai Fjords | Kings Canyon | Kobuk Valley | 68%
|
| P | Petrified Forest | Pinnacles | 63%
|
| T | Theodore Roosevelt | 63%
|
| W | White Sands | Wind Cave | Wrangell-St. Elias | 63%
|
| L | Lake Clark | Lassen Volcanic | 58%
|
| N | New River Gorge | North Cascades | 47%
|
| V | Virgin Islands | Voyageurs | 47%
|