| Castro Valley to Rheinbach | 5,594.33 mi (9,003.21 km) |
| Castro Valley to Rheinberg | 5,535.58 mi (8,908.66 km) |
| Castro Valley to Rheine | 5,517.93 mi (8,880.25 km) |
| Castro Valley to Rheinfelden (Baden) | 5,784.92 mi (9,309.93 km) |
| Castro Valley to Ribnitz-Damgarten | 5,533.06 mi (8,904.59 km) |
| Castro Valley to Richterich | 5,560.57 mi (8,948.87 km) |
| Castro Valley to Riedlingen | 5,799.20 mi (9,332.91 km) |
| Castro Valley to Riegelsberg | 5,666.46 mi (9,119.29 km) |
| Castro Valley to Rielasingen-Worblingen | 5,804.96 mi (9,342.18 km) |
| Castro Valley to Riesa | 5,720.15 mi (9,205.70 km) |
| Castro Valley to Rietberg | 5,570.40 mi (8,964.69 km) |
| Castro Valley to Rinteln | 5,565.68 mi (8,957.09 km) |
| Castro Valley to Ritterhude | 5,502.77 mi (8,855.85 km) |
| Castro Valley to Rodenbach | 5,676.91 mi (9,136.11 km) |
| Castro Valley to Rodental | 5,722.71 mi (9,209.80 km) |
