| Castro Valley to Redon | 5,478.74 mi (8,817.19 km) |
| Castro Valley to Reims | 5,585.15 mi (8,988.43 km) |
| Castro Valley to Rennes | 5,468.84 mi (8,801.24 km) |
| Castro Valley to Revel | 5,825.70 mi (9,375.56 km) |
| Castro Valley to Reze | 5,518.32 mi (8,880.88 km) |
| Castro Valley to Riedisheim | 5,762.58 mi (9,273.98 km) |
| Castro Valley to Rillieux-la-Pape | 5,793.38 mi (9,323.55 km) |
| Castro Valley to Riom | 5,734.25 mi (9,228.38 km) |
| Castro Valley to Riorges | 5,755.26 mi (9,262.19 km) |
| Castro Valley to Ris-Orangis | 5,568.93 mi (8,962.32 km) |
| Castro Valley to Rive-de-Gier | 5,800.28 mi (9,334.65 km) |
| Castro Valley to Rivesaltes | 5,890.44 mi (9,479.75 km) |
| Castro Valley to Rixheim | 5,763.64 mi (9,275.68 km) |
| Castro Valley to Roanne | 5,756.45 mi (9,264.12 km) |
| Castro Valley to Roche-la-Moliere | 5,796.27 mi (9,328.20 km) |
