| Grass Valley to Rockville (Maryland) | 2,328.27 mi (3,746.99 km) |
| Grass Valley to Rockville Centre (New York) | 2,482.74 mi (3,995.58 km) |
| Grass Valley to Rockwall (Texas) | 1,436.84 mi (2,312.37 km) |
| Grass Valley to Rocky Mount (North Carolina) | 2,355.85 mi (3,791.37 km) |
| Grass Valley to Rocky Point (New York) | 2,514.03 mi (4,045.93 km) |
| Grass Valley to Rocky River (Ohio) | 2,052.36 mi (3,302.95 km) |
| Grass Valley to Roessleville (New York) | 2,445.10 mi (3,935.01 km) |
| Grass Valley to Rogers (Arkansas) | 1,477.27 mi (2,377.44 km) |
| Grass Valley to Rogers (Minnesota) | 1,457.22 mi (2,345.16 km) |
| Grass Valley to Rohnert Park (California) | 107.26 mi (172.62 km) |
| Grass Valley to Rolla (Missouri) | 1,577.59 mi (2,538.88 km) |
| Grass Valley to Rolling Meadows (Illinois) | 1,731.65 mi (2,786.82 km) |
| Grass Valley to Roma (Texas) | 1,549.28 mi (2,493.32 km) |
| Grass Valley to Rome (Georgia) | 2,001.69 mi (3,221.40 km) |
| Grass Valley to Rome (New York) | 2,354.39 mi (3,789.02 km) |
