| Castle Rock to Oak Harbor (Washington) | 1,075.19 mi (1,730.36 km) |
| Castle Rock to Oak Hills (Oregon) | 1,008.04 mi (1,622.28 km) |
| Castle Rock to Oak Lawn (Illinois) | 910.67 mi (1,465.58 km) |
| Castle Rock to Oak Park (California) | 848.15 mi (1,364.96 km) |
| Castle Rock to Oak Park (Illinois) | 909.80 mi (1,464.17 km) |
| Castle Rock to Oak Park (Michigan) | 1,148.05 mi (1,847.61 km) |
| Castle Rock to Oak Ridge (Florida) | 1,533.68 mi (2,468.22 km) |
| Castle Rock to Oak Ridge (New Jersey) | 1,597.90 mi (2,571.58 km) |
| Castle Rock to Oak Ridge (Tennessee) | 1,146.19 mi (1,844.62 km) |
| Castle Rock to Oakdale (California) | 869.98 mi (1,400.10 km) |
| Castle Rock to Oakdale (Minnesota) | 720.58 mi (1,159.66 km) |
| Castle Rock to Oakland (California) | 942.69 mi (1,517.11 km) |
| Castle Rock to Oakland (New Jersey) | 1,611.20 mi (2,592.97 km) |
| Castle Rock to Oakland Park (Florida) | 1,691.33 mi (2,721.94 km) |
| Castle Rock to Oakleaf Plantation (Florida) | 1,447.43 mi (2,329.42 km) |
