| Boulder to Portage (Michigan) | 1,032.14 mi (1,661.06 km) |
| Boulder to Portage (Wisconsin) | 847.44 mi (1,363.83 km) |
| Boulder to Portales (New Mexico) | 417.41 mi (671.76 km) |
| Boulder to Porterville (California) | 797.21 mi (1,282.99 km) |
| Boulder to Portland (Maine) | 1,804.35 mi (2,903.82 km) |
| Boulder to Portland (Oregon) | 958.40 mi (1,542.39 km) |
| Boulder to Portland (Tennessee) | 1,040.60 mi (1,674.68 km) |
| Boulder to Portland (Texas) | 952.26 mi (1,532.52 km) |
| Boulder to Portsmouth (New Hampshire) | 1,782.22 mi (2,868.20 km) |
| Boulder to Portsmouth (Ohio) | 1,191.33 mi (1,917.26 km) |
| Boulder to Portsmouth (Virginia) | 1,572.34 mi (2,530.44 km) |
| Boulder to Post Falls (Idaho) | 786.82 mi (1,266.26 km) |
| Boulder to Potomac (Maryland) | 1,490.92 mi (2,399.40 km) |
| Boulder to Potomac Park (California) | 814.80 mi (1,311.30 km) |
| Boulder to Pottstown (Pennsylvania) | 1,556.68 mi (2,505.23 km) |
