| Boulder to Port Chester (New York) | 1,651.36 mi (2,657.60 km) |
| Boulder to Port Hueneme (California) | 867.65 mi (1,396.35 km) |
| Boulder to Port Huron (Michigan) | 1,194.21 mi (1,921.89 km) |
| Boulder to Port Lavaca (Texas) | 928.05 mi (1,493.56 km) |
| Boulder to Port Neches (Texas) | 942.59 mi (1,516.95 km) |
| Boulder to Port Orange (Florida) | 1,564.46 mi (2,517.76 km) |
| Boulder to Port Orchard (Washington) | 1,007.73 mi (1,621.79 km) |
| Boulder to Port Royal (South Carolina) | 1,461.98 mi (2,352.82 km) |
| Boulder to Port Salerno (Florida) | 1,685.87 mi (2,713.15 km) |
| Boulder to Port St. John (Florida) | 1,600.02 mi (2,574.98 km) |
| Boulder to Port St. Lucie (Florida) | 1,670.56 mi (2,688.51 km) |
| Boulder to Port Washington (New York) | 1,652.70 mi (2,659.77 km) |
| Boulder to Port Washington (Wisconsin) | 923.54 mi (1,486.30 km) |
| Boulder to Port Wentworth (Georgia) | 1,441.79 mi (2,320.34 km) |
| Boulder to Portage (Indiana) | 949.55 mi (1,528.16 km) |
