| Grover Beach to Rockville (Maryland) | 2,387.97 mi (3,843.07 km) |
| Grover Beach to Rockville Centre (New York) | 2,559.53 mi (4,119.16 km) |
| Grover Beach to Rockwall (Texas) | 1,389.79 mi (2,236.65 km) |
| Grover Beach to Rocky Mount (North Carolina) | 2,388.11 mi (3,843.29 km) |
| Grover Beach to Rocky Point (New York) | 2,593.70 mi (4,174.16 km) |
| Grover Beach to Rocky River (Ohio) | 2,128.97 mi (3,426.24 km) |
| Grover Beach to Roessleville (New York) | 2,537.83 mi (4,084.25 km) |
| Grover Beach to Rogers (Arkansas) | 1,482.36 mi (2,385.63 km) |
| Grover Beach to Rogers (Minnesota) | 1,578.18 mi (2,539.83 km) |
| Grover Beach to Rohnert Park (California) | 250.88 mi (403.76 km) |
| Grover Beach to Rolla (Missouri) | 1,607.55 mi (2,587.10 km) |
| Grover Beach to Rolling Meadows (Illinois) | 1,812.37 mi (2,916.72 km) |
| Grover Beach to Roma (Texas) | 1,412.95 mi (2,273.92 km) |
| Grover Beach to Rome (Georgia) | 2,003.12 mi (3,223.71 km) |
| Grover Beach to Rome (New York) | 2,450.21 mi (3,943.24 km) |
