area (sq. miles) | county count | state count | span (miles) | span center | span end 1 | span end 2 |
1 | 556386 | 1 | 155 | 1 | 8 | 1 | 1173 | White Pine-NV (38.68, 114.27) | Gilliam-OR (45.74, 120.65) | Cochise-AZ (31.33, 109.05) |
2 | 18426 | 4 | 3 | 3 | 1 | 3 | 243 | Fremont-WY (43.48, 109.25) | Fremont-WY (42.26, 107.52) | Teton-WY (44.67, 111.06) |
3 | 14015 | 2 | 5 | 2 | 2 | 2 | 299 | Big Horn-WY (44.87, 108.35) | Johnson-WY (43.50, 106.02) | Park-MT (46.19, 110.78) |
4 | 12604 | 3 | 4 | 3 | 1 | 4 | 186 | Camas-ID (43.55, 114.59) | Blaine-ID (42.68, 113.18) | Boise-ID (44.15, 116.27) |
5 | 6193 | 6 | 1 | 3 | 1 | 5 | 118 | Brewster-TX (29.82, 103.30) | Brewster-TX (28.97, 103.15) | Brewster-TX (30.67, 103.44) |
6 | 3814 | 6 | 1 | 3 | 1 | 7 | 106 | Culberson-TX (31.33, 104.47) | Culberson-TX (30.66, 104.92) | Culberson-TX (32.00, 104.02) |
7 | 2786 | 6 | 1 | 3 | 1 | 6 | 112 | Pennington-SD (44.12, 102.99) | Pennington-SD (44.51, 102.00) | Pennington-SD (43.85, 104.06) |
8 | 2415 | 5 | 2 | 3 | 1 | 9 | 76 | Clackamas-OR (45.38, 122.10) | Clackamas-OR (45.13, 122.79) | Hood River-OR (45.70, 121.44) |
9 | 2130 | 6 | 1 | 3 | 1 | 10 | 67 | El Paso-CO (38.83, 104.54) | El Paso-CO (38.52, 104.05) | El Paso-CO (39.13, 105.03) |
10 | 1806 | 6 | 1 | 3 | 1 | 8 | 77 | Pierce-WA (47.10, 122.12) | Pierce-WA (47.40, 122.80) | Pierce-WA (46.79, 121.44) |
11 | 1218 | 6 | 1 | 3 | 1 | 12 | 59 | Slope-ND (46.45, 103.49) | Slope-ND (46.63, 102.93) | Slope-ND (46.28, 104.05) |
12 | 1168 | 6 | 1 | 3 | 1 | 11 | 64 | Bernalillo-NM (35.05, 106.67) | Bernalillo-NM (35.22, 107.20) | Bernalillo-NM (34.87, 106.15) |