| Boulder to Sanford (Maine) | 1,781.39 mi (2,866.87 km) |
| Boulder to Sanford (North Carolina) | 1,452.93 mi (2,338.26 km) |
| Boulder to Sanger (California) | 807.30 mi (1,299.23 km) |
| Boulder to Santa Ana (California) | 820.93 mi (1,321.16 km) |
| Boulder to Santa Barbara (California) | 883.42 mi (1,421.73 km) |
| Boulder to Santa Clara (California) | 918.50 mi (1,478.18 km) |
| Boulder to Santa Clara (Oregon) | 957.48 mi (1,540.91 km) |
| Boulder to Santa Clarita (California) | 824.04 mi (1,326.17 km) |
| Boulder to Santa Cruz (California) | 929.99 mi (1,496.68 km) |
| Boulder to Santa Fe (New Mexico) | 304.06 mi (489.34 km) |
| Boulder to Santa Fe (Texas) | 932.70 mi (1,501.03 km) |
| Boulder to Santa Fe Springs (California) | 821.63 mi (1,322.28 km) |
| Boulder to Santa Maria (California) | 902.63 mi (1,452.64 km) |
| Boulder to Santa Monica (California) | 838.01 mi (1,348.64 km) |
| Boulder to Santa Paula (California) | 853.96 mi (1,374.32 km) |
