area (sq. miles) | county count | state count | span (miles) | span center | span end 1 | span end 2 |
1 | 10200 | 6 | 2 | 4 | 1 | 4 | 157 | Siskiyou-CA (41.21, 122.44) | Shasta-CA (40.45, 121.33) | Siskiyou-CA (41.99, 123.54) |
2 | 9622 | 1 | 20 | 1 | 2 | 2 | 200 | Nelson-VA (37.75, 78.70) | Pittsylvania-VA (36.54, 79.71) | Fauquier-VA (38.94, 77.66) |
3 | 6970 | 4 | 3 | 4 | 1 | 1 | 202 | Washoe-NV (40.55, 119.67) | Washoe-NV (42.00, 119.99) | Carson City-NV (39.09, 119.55) |
4 | 5922 | 2 | 7 | 4 | 1 | 3 | 196 | Sacramento-CA (38.35, 121.54) | El Dorado-CA (38.92, 119.89) | San Francisco-CA (37.75, 123.17) |
5 | 3132 | 10 | 1 | 4 | 1 | 5 | 129 | Mineral-NV (38.09, 118.70) | Mono-CA (37.46, 117.83) | Mono-CA (38.71, 119.59) |
6 | 2786 | 10 | 1 | 4 | 1 | 6 | 112 | Pennington-SD (44.12, 102.99) | Pennington-SD (44.51, 102.00) | Pennington-SD (43.85, 104.06) |
7 | 2130 | 10 | 1 | 4 | 1 | 8 | 67 | El Paso-CO (38.83, 104.54) | El Paso-CO (38.52, 104.05) | El Paso-CO (39.13, 105.03) |
8 | 1840 | 10 | 1 | 4 | 1 | 10 | 64 | Cimarron-OK (36.75, 102.52) | Cimarron-OK (37.00, 103.00) | Cimarron-OK (36.50, 102.03) |
9 | 1621 | 10 | 1 | 4 | 1 | 9 | 65 | Jackson-CO (40.68, 106.41) | Jackson-CO (40.35, 105.96) | Jackson-CO (41.00, 106.86) |
10 | 1374 | 4 | 3 | 4 | 1 | 7 | 79 | Adams-CO (39.85, 104.42) | Denver-CO (39.63, 105.11) | Adams-CO (40.00, 103.71) |
11 | 1138 | 6 | 2 | 1 | 2 | 14 | 53 | Sevier-TN (35.66, 83.59) | Sevier-TN (36.04, 83.66) | Swain-NC (35.28, 83.68) |
12 | 1081 | 10 | 1 | 4 | 1 | 13 | 53 | Somerset-PA (39.99, 79.04) | Somerset-PA (39.74, 79.41) | Somerset-PA (40.24, 78.66) |
13 | 1017 | 6 | 2 | 4 | 1 | 12 | 61 | Grand-CO (39.74, 105.92) | Summit-CO (39.92, 106.44) | Clear Creek-CO (39.57, 105.40) |
14 | 915 | 10 | 1 | 4 | 1 | 15 | 43 | Wallace-KS (38.92, 101.76) | Wallace-KS (39.14, 101.48) | Wallace-KS (38.70, 102.05) |
15 | 898 | 6 | 2 | 4 | 1 | 11 | 61 | Grayson-VA (36.75, 81.34) | Grayson-VA (36.56, 80.84) | Smyth-VA (36.93, 81.84) |
16 | 515 | 3 | 4 | 1 | 2 | 17 | 34 | Fairfax-VA (38.85, 77.22) | Fairfax-VA (38.84, 77.54) | City of Washington-DC (38.89, 76.91) |
17 | 494 | 10 | 1 | 4 | 1 | 16 | 40 | New Castle-DE (39.56, 75.61) | New Castle-DE (39.83, 75.47) | New Castle-DE (39.30, 75.76) |
18 | 362 | 10 | 1 | 4 | 1 | 18 | 32 | Giles-VA (37.32, 80.73) | Giles-VA (37.28, 81.01) | Giles-VA (37.32, 80.43) |
19 | 313 | 10 | 1 | 4 | 1 | 20 | 28 | Yancey-NC (35.89, 82.33) | Yancey-NC (36.08, 82.40) | Yancey-NC (35.70, 82.26) |
20 | 271 | 10 | 1 | 4 | 1 | 19 | 28 | DeKalb-GA (33.79, 84.23) | DeKalb-GA (33.97, 84.35) | DeKalb-GA (33.61, 84.12) |
21 | 66 | 10 | 1 | 4 | 1 | 21 | 17 | Saint Louis City-MO (38.65, 90.21) | Saint Louis City-MO (38.53, 90.26) | Saint Louis City-MO (38.77, 90.17) |
22 | 43 | 10 | 1 | 4 | 1 | 22 | 9 | Roanoke city-VA (37.28, 79.96) | Roanoke city-VA (37.30, 79.88) | Roanoke city-VA (37.25, 80.04) |