| Mack to Ridgeland (Mississippi) | 556.41 mi (895.45 km) |
| Mack to Ridgewood (New Jersey) | 572.52 mi (921.38 km) |
| Mack to Rifle (Colorado) | 1,230.89 mi (1,980.92 km) |
| Mack to Rincon (Georgia) | 511.37 mi (822.98 km) |
| Mack to Ringwood (New Jersey) | 565.67 mi (910.35 km) |
| Mack to Río Grande (Puerto Rico) | 1,825.25 mi (2,937.46 km) |
| Mack to Rio Grande City (Texas) | 1,202.55 mi (1,935.32 km) |
| Mack to Rio Linda (California) | 1,962.80 mi (3,158.83 km) |
| Mack to Rio Rancho (New Mexico) | 1,237.24 mi (1,991.15 km) |
| Mack to Rio Rico (Arizona) | 1,567.82 mi (2,523.17 km) |
| Mack to Ripon (California) | 1,961.65 mi (3,156.96 km) |
| Mack to River Edge (New Jersey) | 575.73 mi (926.55 km) |
| Mack to River Falls (Wisconsin) | 567.06 mi (912.59 km) |
| Mack to River Forest (Illinois) | 251.34 mi (404.49 km) |
| Mack to River Grove (Illinois) | 253.48 mi (407.94 km) |
