| Castle Rock to Myrtle Grove (North Carolina) | 1,530.37 mi (2,462.89 km) |
| Castle Rock to Nacogdoches (Texas) | 784.47 mi (1,262.48 km) |
| Castle Rock to Nampa (Idaho) | 671.46 mi (1,080.61 km) |
| Castle Rock to Nanakuli (Hawaii) | 3,356.39 mi (5,401.58 km) |
| Castle Rock to Nanticoke (Pennsylvania) | 1,518.91 mi (2,444.45 km) |
| Castle Rock to Nanuet (New York) | 1,622.40 mi (2,611.00 km) |
| Castle Rock to Napa (California) | 940.49 mi (1,513.58 km) |
| Castle Rock to Naperville (Illinois) | 889.64 mi (1,431.74 km) |
| Castle Rock to Naples (Florida) | 1,614.01 mi (2,597.50 km) |
| Castle Rock to Naranja (Florida) | 1,707.44 mi (2,747.86 km) |
| Castle Rock to Nashua (New Hampshire) | 1,742.09 mi (2,803.63 km) |
| Castle Rock to Nashville (Tennessee) | 1,009.51 mi (1,624.65 km) |
| Castle Rock to Natchez (Mississippi) | 929.58 mi (1,496.01 km) |
| Castle Rock to Natchitoches (Louisiana) | 844.71 mi (1,359.43 km) |
| Castle Rock to National City (California) | 825.36 mi (1,328.29 km) |
