area (sq. miles) | county count | state count | span (miles) | span center | span end 1 | span end 2 |
1 | 259727 | 1 | 81 | 1 | 4 | 1 | 1076 | Nye-NV (39.11, 117.32) | Maricopa-AZ (32.51, 112.20) | Yamhill-OR (45.43, 123.46) |
2 | 77920 | 2 | 24 | 2 | 2 | 2 | 563 | Garfield-UT (38.14, 112.32) | Box Elder-UT (41.99, 114.04) | Coconino-AZ (34.26, 110.76) |
3 | 14199 | 5 | 2 | 3 | 1 | 3 | 176 | Fremont-WY (42.94, 109.03) | Fremont-WY (44.01, 110.05) | Fremont-WY (42.26, 107.52) |
4 | 11171 | 4 | 3 | 3 | 1 | 4 | 168 | Sierra-NM (32.85, 107.64) | Grant-NM (31.86, 108.52) | Sierra-NM (33.48, 106.37) |
5 | 10997 | 5 | 2 | 3 | 1 | 5 | 168 | McKinley-NM (35.98, 108.24) | San Juan-NM (37.00, 107.42) | McKinley-NM (34.96, 109.05) |
6 | 10272 | 5 | 2 | 3 | 1 | 6 | 159 | Chaves-NM (33.05, 104.30) | Eddy-NM (32.00, 103.72) | Chaves-NM (34.09, 104.89) |
7 | 5957 | 5 | 2 | 3 | 1 | 7 | 117 | Union-NM (36.24, 103.50) | Union-NM (37.00, 103.00) | Harding-NM (35.39, 103.64) |
8 | 4938 | 11 | 1 | 3 | 1 | 8 | 111 | Custer-ID (44.20, 114.32) | Custer-ID (43.80, 113.36) | Custer-ID (44.61, 115.28) |
9 | 4028 | 3 | 5 | 3 | 1 | 9 | 106 | Elbert-CO (39.44, 104.39) | Elbert-CO (38.87, 103.72) | Broomfield-CO (39.95, 105.13) |
10 | 2812 | 11 | 1 | 3 | 1 | 10 | 95 | Park-MT (45.54, 110.42) | Park-MT (46.19, 110.78) | Park-MT (45.00, 109.80) |
11 | 2244 | 11 | 1 | 3 | 1 | 11 | 91 | Montrose-CO (38.41, 108.27) | Montrose-CO (38.15, 109.04) | Montrose-CO (38.67, 107.50) |
12 | 1806 | 11 | 1 | 3 | 1 | 12 | 77 | Pierce-WA (47.10, 122.12) | Pierce-WA (47.40, 122.80) | Pierce-WA (46.79, 121.44) |
13 | 1377 | 5 | 2 | 3 | 1 | 13 | 61 | Jasper-MS (31.83, 89.16) | Jasper-MS (32.22, 88.91) | Jones-MS (31.43, 89.40) |
14 | 1191 | 5 | 2 | 3 | 1 | 14 | 59 | Harrison-TX (32.53, 94.52) | Gregg-TX (32.37, 94.99) | Harrison-TX (32.69, 94.04) |
15 | 1150 | 11 | 1 | 3 | 1 | 15 | 55 | Walton-FL (30.63, 86.19) | Walton-FL (30.27, 86.00) | Walton-FL (30.99, 86.39) |
16 | 669 | 11 | 1 | 3 | 1 | 16 | 44 | Saint Johns-FL (29.93, 81.43) | Saint Johns-FL (30.25, 81.38) | Saint Johns-FL (29.62, 81.52) |
17 | 656 | 11 | 1 | 3 | 1 | 18 | 37 | Clark-WA (45.80, 122.42) | Clark-WA (46.05, 122.25) | Clark-WA (45.66, 122.76) |
18 | 631 | 11 | 1 | 3 | 1 | 19 | 36 | Ouachita-LA (32.49, 92.14) | Ouachita-LA (32.71, 91.98) | Ouachita-LA (32.28, 92.31) |
19 | 610 | 11 | 1 | 3 | 1 | 17 | 37 | Scott-MS (32.42, 89.55) | Scott-MS (32.60, 89.78) | Scott-MS (32.22, 89.32) |
20 | 405 | 11 | 1 | 3 | 1 | 20 | 28 | Wayne-IN (39.87, 85.01) | Wayne-IN (40.01, 84.81) | Wayne-IN (39.72, 85.19) |