| Acadia (ACAD) | 444 | 91-99 | 37 | 6 | 924 | 930 | 0 |
| Agate Fossil Beds (AGFO) | 69 | 91-99 | 4 | 0 | 133 | 133 | 0 |
| Amistad (AMIS) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Apostle Islands (APIS) | 323 | 91-99 | 13 | 0 | 993 | 993 | 0 |
| Appalachian (APPA) | 2 | 1-25 | 1 | 0 | 2 | 2 | 0 |
| Arches (ARCH) | 27 | 1-25 | 7 | 0 | 43 | 43 | 0 |
| Assateague Island (ASIS) | 37 | 26-50 | 1 | 0 | 37 | 37 | 0 |
| Badlands (BADL) | 177 | 76-90 | 9 | 0 | 333 | 333 | 0 |
| Bandelier (BAND) | 211 | 91-99 | 3 | 0 | 216 | 216 | 0 |
| Bering Land Bridge (BELA) | 146 | 26-50 | 1 | 0 | 146 | 146 | 0 |
| Big Bend (BIBE) | 289 | 91-99 | 44 | 0 | 531 | 531 | 5 |
| Big Cypress (BICY) | 11 | 1-25 | 5 | 0 | 19 | 19 | 0 |
| Big South Fork (BISO) | 2 | 1-25 | 2 | 0 | 2 | 2 | 0 |
| Big Thicket (BITH) | 117 | 51-75 | 8 | 0 | 256 | 256 | 0 |
| Black Canyon of the Gunnison (BLCA) | 11 | 1-25 | 4 | 0 | 11 | 11 | 0 |
| Blue Ridge (BLRI) | 246 | 51-75 | 18 | 3 | 372 | 375 | 0 |
| Boston Harbor Islands (BOHA) | 174 | 76-90 | 7 | 0 | 355 | 355 | 0 |
| Bryce Canyon (BRCA) | 3 | 1-25 | 3 | 0 | 3 | 3 | 0 |
| Buffalo (BUFF) | 154 | 76-90 | 5 | 132 | 39 | 171 | 0 |
| Cabrillo (CABR) | 47 | 26-50 | 5 | 0 | 49 | 49 | 0 |
| Canyonlands (CANY) | 41 | 26-50 | 7 | 0 | 53 | 53 | 1 |
| Cape Cod (CACO) | 178 | 76-90 | 5 | 98 | 145 | 243 | 0 |
| Cape Hatteras (CAHA) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Cape Krusenstern (CAKR) | 75 | 1-25 | 1 | 0 | 75 | 75 | 0 |
| Cape Lookout (CALO) | 27 | 1-25 | 3 | 0 | 29 | 29 | 0 |
| Capitol Reef (CARE) | 36 | 1-25 | 5 | 0 | 42 | 42 | 0 |
| Capulin Volcano (CAVO) | 42 | 76-90 | 5 | 0 | 50 | 50 | 0 |
| Carl Sandburg Home (CARL) | 74 | 51-75 | 1 | 0 | 74 | 74 | 0 |
| Carlsbad Caverns (CAVE) | 2 | 1-25 | 1 | 0 | 2 | 2 | 0 |
| Cedar Breaks (CEBR) | 80 | 51-75 | 2 | 0 | 80 | 80 | 0 |
| Chaco Culture (CHCU) | 124 | 76-90 | 8 | 0 | 151 | 151 | 1 |
| Channel Islands (CHIS) | 273 | 91-99 | 58 | 8 | 384 | 392 | 20 |
| Chickasaw (CHIC) | 24 | 1-25 | 5 | 0 | 28 | 28 | 0 |
| Chiricahua (CHIR) | 325 | 91-99 | 29 | 187 | 300 | 487 | 6 |
| Colonial (COLO) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Colorado (COLM) | 67 | 26-50 | 14 | 0 | 93 | 93 | 0 |
| Congaree Swamp (COSW) | 81 | 26-50 | 1 | 0 | 81 | 81 | 0 |
| Crater Lake (CRLA) | 65 | 26-50 | 13 | 0 | 88 | 88 | 1 |
| Craters of the Moon (CRMO) | 23 | 1-25 | 2 | 0 | 24 | 24 | 0 |
| Cumberland Island (CUIS) | 26 | 26-50 | 1 | 5 | 21 | 26 | 0 |
| Cuyahoga Valley (CUVA) | 73 | 91-99 | 5 | 0 | 136 | 136 | 0 |
| Death Valley (DEVA) | 12 | 1-25 | 5 | 0 | 14 | 14 | 0 |
| Delaware Water Gap (DEWA) | 333 | 91-99 | 31 | 1 | 740 | 741 | 0 |
| Denali (DENA) | 259 | 51-75 | 27 | 0 | 449 | 449 | 0 |
| Devils Tower (DETO) | 130 | 91-99 | 4 | 65 | 80 | 145 | 1 |
| Dinosaur (DINO) | 26 | 1-25 | 16 | 0 | 30 | 30 | 1 |
| Effigy Mounds (EFMO) | 84 | 91-99 | 6 | 0 | 164 | 164 | 0 |
| El Malpais (ELMA) | 87 | 51-75 | 4 | 0 | 88 | 88 | 0 |
| Everglades (EVER) | 114 | 26-50 | 14 | 0 | 167 | 167 | 0 |
| Fire Island (FIIS) | 29 | 26-50 | 2 | 6 | 24 | 30 | 0 |
| Florissant Fossil Beds (FLFO) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Fort Clatsop (FOCL) | 4 | 1-25 | 1 | 0 | 4 | 4 | 0 |
| Fort Davis (FODA) | 3 | 1-25 | 1 | 3 | 0 | 3 | 0 |
| Fort Frederica (FOFR) | 45 | 76-90 | 4 | 0 | 87 | 87 | 0 |
| Fort Matanzas (FOMA) | 12 | 1-25 | 1 | 0 | 12 | 12 | 0 |
| Fort Raleigh (FORA) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Fort Union Trading Post (FOUS) | 42 | 76-90 | 2 | 0 | 81 | 81 | 0 |
| Gates of the Arctic (GAAR) | 441 | 91-99 | 14 | 0 | 958 | 958 | 2 |
| Gateway Arch (GATE) | 2 | 1-25 | 1 | 0 | 2 | 2 | 0 |
| George Washington Carver (GWCA) | 43 | 76-90 | 4 | 0 | 75 | 75 | 0 |
| Glacier (GLAC) | 480 | 91-99 | 39 | 5 | 918 | 923 | 0 |
| Glacier Bay (GLBA) | 69 | 1-25 | 10 | 0 | 118 | 118 | 0 |
| Glen Canyon (GLCA) | 10 | 1-25 | 1 | 0 | 10 | 10 | 0 |
| Golden Gate (GOGA) | 7 | 1-25 | 5 | 1 | 6 | 7 | 0 |
| Grand Canyon (GRCA) | 255 | 51-75 | 34 | 0 | 652 | 652 | 6 |
| Grand Portage (GRPO) | 199 | 91-99 | 8 | 1 | 559 | 560 | 0 |
| Grand Teton (GRTE) | 221 | 51-75 | 9 | 0 | 250 | 250 | 0 |
| Great Sand Dunes (GRSA) | 10 | 26-50 | 6 | 0 | 10 | 10 | 0 |
| Great Smoky Mountains (GRSM) | 463 | 91-99 | 65 | 3 | 980 | 983 | 28 |
| Guadalupe Mountains (GUMO) | 5 | 1-25 | 2 | 0 | 5 | 5 | 0 |
| Gulf Islands (GUIS) | 10 | 1-25 | 1 | 5 | 5 | 10 | 0 |
| Hagerman Fossil Beds (HAFO) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Haleakala (HALE) | 52 | 1-25 | 2 | 0 | 92 | 92 | 0 |
| Harpers Ferry (HAFE) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Hawaii Volcanoes (HAVO) | 157 | 51-75 | 3 | 11 | 157 | 168 | 0 |
| Homestead (HOME) | 19 | 76-90 | 3 | 0 | 39 | 39 | 0 |
| Hot Springs (HOSP) | 214 | 76-90 | 6 | 0 | 434 | 434 | 0 |
| Illinois & Michigan Canal (ILMI) | 50 | 51-75 | 1 | 0 | 50 | 50 | 1 |
| Indiana Dunes (INDU) | 69 | 91-99 | 6 | 0 | 200 | 200 | 0 |
| Isle Royale (ISRO) | 613 | 91-99 | 72 | 0 | 1631 | 1631 | 3 |
| Jewel Cave (JECA) | 158 | 76-90 | 5 | 110 | 64 | 174 | 1 |
| John Day Fossil Beds (JODA) | 2 | 1-25 | 1 | 0 | 2 | 2 | 0 |
| Joshua Tree (JOTR) | 69 | 51-75 | 8 | 0 | 85 | 85 | 0 |
| Katmai (KATM) | 7 | 1-25 | 2 | 0 | 8 | 8 | 0 |
| Kenilworth (KEPA) | 6 | 1-25 | 1 | 0 | 6 | 6 | 0 |
| Keweenaw (KEWE) | 354 | 91-99 | 5 | 352 | 210 | 562 | 0 |
| Kings Canyon (KICA) | 110 | 51-75 | 6 | 0 | 210 | 210 | 0 |
| Kings Mountain (KIMO) | 125 | 51-75 | 1 | 0 | 125 | 125 | 0 |
| Klondike Gold Rush (KLGO) | 65 | 1-25 | 3 | 60 | 10 | 70 | 0 |
| Knife River Indian Villages (KNRI) | 48 | 76-90 | 5 | 0 | 95 | 95 | 0 |
| Kobuk Valley (KOVA) | 48 | 1-25 | 1 | 0 | 48 | 48 | 0 |
| Lake Chelan (LACH) | 21 | 1-25 | 4 | 0 | 41 | 41 | 0 |
| Lassen Volcanic (LAVO) | 9 | 1-25 | 5 | 0 | 9 | 9 | 0 |
| Lava Beds (LABE) | 19 | 1-25 | 4 | 0 | 21 | 21 | 0 |
| Lincoln Boyhood (LIBO) | 16 | 26-50 | 1 | 0 | 16 | 16 | 0 |
| Lyndon B. Johnson (LYJO) | 3 | 1-25 | 1 | 0 | 3 | 3 | 0 |
| Mammoth Cave (MACA) | 45 | 1-25 | 5 | 1 | 44 | 45 | 0 |
| Mesa Verde (MEVE) | 158 | 76-90 | 21 | 0 | 240 | 240 | 1 |
| Minute Man (MIMA) | 102 | 76-90 | 1 | 0 | 102 | 102 | 0 |
| Mississippi (MISS) | 128 | 91-99 | 1 | 128 | 0 | 128 | 0 |
| Mojave (MOJA) | 40 | 26-50 | 3 | 0 | 40 | 40 | 0 |
| Mount Rainier (MORA) | 168 | 76-90 | 34 | 0 | 266 | 266 | 6 |
| Mount Rushmore (MORU) | 222 | 76-90 | 3 | 226 | 14 | 240 | 0 |
| Muir Woods (MUWO) | 10 | 1-25 | 1 | 0 | 10 | 10 | 0 |
| Natchez Trace (NATR) | 40 | 26-50 | 1 | 0 | 40 | 40 | 0 |
| Natural Bridges (NABR) | 3 | 1-25 | 2 | 0 | 3 | 3 | 0 |
| Navajo (NAVA) | 99 | 76-90 | 8 | 0 | 245 | 245 | 0 |
| New River Gorge (NERI) | 2 | 1-25 | 1 | 0 | 2 | 2 | 0 |
| Niobrara (NIOB) | 1 | 1-25 | 1 | 1 | 0 | 1 | 0 |
| Noatak (NOAT) | 59 | 1-25 | 1 | 0 | 59 | 59 | 0 |
| North Cascades (NOCA) | 136 | 26-50 | 4 | 84 | 88 | 172 | 0 |
| Obed (OBRI) | 1 | 1-25 | 1 | 0 | 1 | 1 | 1 |
| Olympic (OLYM) | 353 | 76-90 | 48 | 1 | 634 | 635 | 2 |
| Oregon Caves (ORCA) | 186 | 91-99 | 1 | 0 | 186 | 186 | 0 |
| Oregon Trail (OREG) | 103 | 26-50 | 1 | 0 | 103 | 103 | 0 |
| Organ Pipe Cactus (ORPI) | 15 | 1-25 | 13 | 0 | 21 | 21 | 1 |
| Oxon Run (OXRU) | 5 | 1-25 | 1 | 0 | 5 | 5 | 0 |
| Ozark (OZAR) | 189 | 76-90 | 11 | 4 | 202 | 206 | 1 |
| Parashant (PARA) | 147 | 26-50 | 1 | 0 | 147 | 147 | 0 |
| Petrified Forest (PEFO) | 112 | 76-90 | 4 | 0 | 117 | 117 | 0 |
| Pictured Rocks (PIRO) | 263 | 91-99 | 10 | 0 | 735 | 735 | 0 |
| Pinnacles (PINN) | 266 | 91-99 | 13 | 0 | 328 | 328 | 1 |
| Pipestone (PIPE) | 78 | 91-99 | 6 | 0 | 124 | 124 | 0 |
| Piscataway (PISC) | 9 | 1-25 | 1 | 0 | 9 | 9 | 0 |
| Point Reyes (PORE) | 101 | 26-50 | 23 | 0 | 115 | 115 | 4 |
| Prince William Forest (PRWI) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Redwood (REDW) | 251 | 76-90 | 7 | 169 | 205 | 374 | 0 |
| Rocky Mountain (ROMO) | 419 | 91-99 | 64 | 3 | 739 | 742 | 4 |
| Ross Lake (ROLA) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Saguaro (SAGU) | 299 | 91-99 | 22 | 3 | 543 | 546 | 1 |
| Saint Croix (SACN) | 308 | 91-99 | 14 | 0 | 637 | 637 | 0 |
| San Juan Island (SAJH) | 43 | 1-25 | 1 | 0 | 43 | 43 | 0 |
| Santa Monica Mountains (SAMO) | 333 | 76-90 | 20 | 192 | 335 | 527 | 22 |
| Saratoga (SARA) | 10 | 1-25 | 1 | 0 | 10 | 10 | 0 |
| Scotts Bluff (SCBL) | 74 | 76-90 | 11 | 1 | 141 | 142 | 1 |
| Sequoia (SEQU) | 256 | 91-99 | 31 | 3 | 598 | 601 | 3 |
| Shenandoah (SHEN) | 218 | 76-90 | 29 | 0 | 447 | 447 | 4 |
| Sitka (SITK) | 64 | 26-50 | 4 | 52 | 20 | 72 | 0 |
| Sleeping Bear Dunes (SLBE) | 193 | 91-99 | 7 | 0 | 392 | 392 | 0 |
| Sunset Crater Volcano (SUCR) | 4 | 1-25 | 1 | 0 | 4 | 4 | 0 |
| Tallgrass Prairie (TAPR) | 3 | 1-25 | 2 | 0 | 3 | 3 | 0 |
| Theodore Roosevelt (THRO) | 251 | 91-99 | 24 | 0 | 466 | 466 | 2 |
| Timpanogos Cave (TICA) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Upper Delaware (UPDE) | 1 | 1-25 | 1 | 0 | 1 | 1 | 0 |
| Voyageurs (VOYA) | 498 | 91-99 | 45 | 0 | 1144 | 1144 | 2 |
| White Sands (WHSA) | 4 | 1-25 | 2 | 0 | 5 | 5 | 0 |
| Wilson's Creek (WICR) | 124 | 91-99 | 7 | 0 | 249 | 249 | 0 |
| Wind Cave (WICA) | 87 | 26-50 | 2 | 43 | 50 | 93 | 0 |
| Wupatki (WUPA) | 16 | 1-25 | 1 | 0 | 16 | 16 | 0 |
| Yellowstone (YELL) | 421 | 76-90 | 32 | 3 | 1001 | 1004 | 1 |
| Yosemite (YOSE) | 101 | 26-50 | 35 | 1 | 157 | 158 | 5 |
| Yukon-Charley Rivers (YUCH) | 17 | 1-25 | 2 | 0 | 18 | 18 | 0 |
| Zion (ZION) | 184 | 51-75 | 15 | 0 | 409 | 409 | 0 |
