| Keystone to Camarillo (California) | 2,182.47 mi (3,512.35 km) |
| Keystone to Camas (Washington) | 2,476.02 mi (3,984.77 km) |
| Keystone to Cambridge (Maryland) | 811.85 mi (1,306.55 km) |
| Keystone to Cambridge (Massachusetts) | 1,175.77 mi (1,892.22 km) |
| Keystone to Camden (Arkansas) | 713.92 mi (1,148.94 km) |
| Keystone to Camden (New Jersey) | 920.70 mi (1,481.73 km) |
| Keystone to Cameron Park (California) | 2,311.73 mi (3,720.37 km) |
| Keystone to Camp Pendleton South (California) | 2,087.51 mi (3,359.52 km) |
| Keystone to Camp Springs (Maryland) | 806.44 mi (1,297.84 km) |
| Keystone to Camp Verde (Arizona) | 1,775.79 mi (2,857.86 km) |
| Keystone to Campbell (California) | 2,355.34 mi (3,790.55 km) |
| Keystone to Campbellsville (Kentucky) | 656.26 mi (1,056.14 km) |
| Keystone to Campton Hills (Illinois) | 1,009.22 mi (1,624.19 km) |
| Keystone to Canby (Oregon) | 2,482.07 mi (3,994.51 km) |
| Keystone to Candelaria (Puerto Rico) | 1,236.03 mi (1,989.20 km) |
