| Preakness to Robertsville (New Jersey) | 41.53 mi (66.83 km) |
| Preakness to Robinson (Texas) | 1,429.08 mi (2,299.89 km) |
| Preakness to Robstown (Texas) | 1,608.03 mi (2,587.87 km) |
| Preakness to Rochester (Michigan) | 473.50 mi (762.03 km) |
| Preakness to Rochester (Minnesota) | 952.06 mi (1,532.19 km) |
| Preakness to Rochester (New Hampshire) | 232.93 mi (374.87 km) |
| Preakness to Rochester (New York) | 232.38 mi (373.99 km) |
| Preakness to Rochester Hills (Michigan) | 475.01 mi (764.46 km) |
| Preakness to Rock Hill (South Carolina) | 555.47 mi (893.95 km) |
| Preakness to Rock Island (Illinois) | 849.90 mi (1,367.78 km) |
| Preakness to Rock Springs (Wyoming) | 1,805.53 mi (2,905.72 km) |
| Preakness to Rockford (Illinois) | 771.17 mi (1,241.08 km) |
| Preakness to Rockledge (Florida) | 946.42 mi (1,523.12 km) |
| Preakness to Rocklin (California) | 2,467.69 mi (3,971.37 km) |
| Preakness to Rockport (Texas) | 1,569.77 mi (2,526.31 km) |
