| Boise to Carson (California) | 683.28 mi (1,099.63 km) |
| Boise to Carson City (Nevada) | 357.34 mi (575.09 km) |
| Boise to Carteret (New Jersey) | 2,140.57 mi (3,444.92 km) |
| Boise to Cartersville (Georgia) | 1,798.59 mi (2,894.55 km) |
| Boise to Carthage (Missouri) | 1,231.72 mi (1,982.26 km) |
| Boise to Cary (Illinois) | 1,412.63 mi (2,273.40 km) |
| Boise to Cary (North Carolina) | 2,042.26 mi (3,286.71 km) |
| Boise to Casa de Oro-Mount Helix (California) | 749.79 mi (1,206.67 km) |
| Boise to Casa Grande (Arizona) | 777.29 mi (1,250.93 km) |
| Boise to Casas Adobes (Arizona) | 827.73 mi (1,332.11 km) |
| Boise to Cascades (Virginia) | 2,021.17 mi (3,252.76 km) |
| Boise to Casper (Wyoming) | 501.40 mi (806.93 km) |
| Boise to Casselberry (Florida) | 2,182.29 mi (3,512.06 km) |
| Boise to Castaic (California) | 643.00 mi (1,034.80 km) |
| Boise to Castle Pines (Colorado) | 652.68 mi (1,050.39 km) |
