| Keystone to Cold Springs (Nevada) | 2,267.74 mi (3,649.57 km) |
| Keystone to Coldwater (Michigan) | 964.03 mi (1,551.45 km) |
| Keystone to Colesville (Maryland) | 821.34 mi (1,321.82 km) |
| Keystone to College (Alaska) | 3,750.39 mi (6,035.66 km) |
| Keystone to College Park (Georgia) | 396.08 mi (637.42 km) |
| Keystone to College Park (Maryland) | 818.04 mi (1,316.50 km) |
| Keystone to College Station (Texas) | 841.43 mi (1,354.16 km) |
| Keystone to Collegedale (Tennessee) | 499.41 mi (803.73 km) |
| Keystone to Colleyville (Texas) | 925.33 mi (1,489.18 km) |
| Keystone to Collierville (Tennessee) | 634.33 mi (1,020.85 km) |
| Keystone to Collinsville (Illinois) | 843.89 mi (1,358.11 km) |
| Keystone to Colonia (New Jersey) | 981.01 mi (1,578.78 km) |
| Keystone to Colonial Heights (Virginia) | 699.53 mi (1,125.78 km) |
| Keystone to Colonial Park (Pennsylvania) | 902.94 mi (1,453.14 km) |
| Keystone to Colorado Springs (Colorado) | 1,470.78 mi (2,366.99 km) |
