| Potomac to Oudewater | 3,854.75 mi (6,203.62 km) |
| Potomac to Papendrecht | 3,852.12 mi (6,199.38 km) |
| Potomac to Pijnacker | 3,837.58 mi (6,175.99 km) |
| Potomac to Purmerend | 3,845.87 mi (6,189.33 km) |
| Potomac to Putten | 3,877.28 mi (6,239.88 km) |
| Potomac to Raalte | 3,900.38 mi (6,277.05 km) |
| Potomac to Raamsdonksveer | 3,863.22 mi (6,217.25 km) |
| Potomac to Reeuwijk | 3,848.50 mi (6,193.56 km) |
| Potomac to Renkum | 3,894.44 mi (6,267.49 km) |
| Potomac to Rheden | 3,901.45 mi (6,278.77 km) |
| Potomac to Rhenen | 3,883.69 mi (6,250.20 km) |
| Potomac to Ridderkerk | 3,847.96 mi (6,192.70 km) |
| Potomac to Rijen | 3,869.10 mi (6,226.71 km) |
| Potomac to Rijswijk | 3,832.77 mi (6,168.24 km) |
| Potomac to Roelofarendsveen | 3,840.91 mi (6,181.35 km) |
