| Castle Rock to Arcata (California) | 1,018.74 mi (1,639.50 km) |
| Castle Rock to Archdale (North Carolina) | 1,378.46 mi (2,218.42 km) |
| Castle Rock to Arden-Arcade (California) | 888.15 mi (1,429.34 km) |
| Castle Rock to Ardmore (Oklahoma) | 557.31 mi (896.91 km) |
| Castle Rock to Ardmore (Pennsylvania) | 1,564.95 mi (2,518.55 km) |
| Castle Rock to Arecibo (Puerto Rico) | 2,691.25 mi (4,331.15 km) |
| Castle Rock to Arkadelphia (Arkansas) | 745.41 mi (1,199.62 km) |
| Castle Rock to Arkansas City (Kansas) | 452.88 mi (728.84 km) |
| Castle Rock to Arlington (Tennessee) | 880.26 mi (1,416.64 km) |
| Castle Rock to Arlington (Texas) | 631.35 mi (1,016.06 km) |
| Castle Rock to Arlington (Virginia) | 1,482.01 mi (2,385.07 km) |
| Castle Rock to Arlington (Washington) | 1,051.26 mi (1,691.83 km) |
| Castle Rock to Arlington Heights (Illinois) | 901.42 mi (1,450.69 km) |
| Castle Rock to Arnold (Maryland) | 1,511.96 mi (2,433.27 km) |
| Castle Rock to Arnold (Missouri) | 780.49 mi (1,256.07 km) |
