| Castle Rock to North Augusta (South Carolina) | 1,331.14 mi (2,142.26 km) |
| Castle Rock to North Aurora (Illinois) | 881.03 mi (1,417.87 km) |
| Castle Rock to North Babylon (New York) | 1,661.12 mi (2,673.31 km) |
| Castle Rock to North Bay Shore (New York) | 1,664.15 mi (2,678.18 km) |
| Castle Rock to North Bellmore (New York) | 1,650.34 mi (2,655.96 km) |
| Castle Rock to North Bellport (New York) | 1,680.32 mi (2,704.22 km) |
| Castle Rock to North Bend (Oregon) | 1,039.89 mi (1,673.54 km) |
| Castle Rock to North Bethesda (Maryland) | 1,479.14 mi (2,380.45 km) |
| Castle Rock to North Branch (Minnesota) | 738.71 mi (1,188.84 km) |
| Castle Rock to North Canton (Ohio) | 1,239.82 mi (1,995.30 km) |
| Castle Rock to North Charleston (South Carolina) | 1,447.75 mi (2,329.93 km) |
| Castle Rock to North Chicago (Illinois) | 909.49 mi (1,463.68 km) |
| Castle Rock to North Decatur (Georgia) | 1,200.75 mi (1,932.43 km) |
| Castle Rock to North Druid Hills (Georgia) | 1,198.53 mi (1,928.85 km) |
| Castle Rock to North Fair Oaks (California) | 946.76 mi (1,523.67 km) |
