| Boulder to Washington (Indiana) | 969.73 mi (1,560.64 km) |
| Boulder to Washington (Missouri) | 767.27 mi (1,234.81 km) |
| Boulder to Washington (Pennsylvania) | 1,317.24 mi (2,119.89 km) |
| Boulder to Washington (Utah) | 487.46 mi (784.49 km) |
| Boulder to Washington Court House (Ohio) | 1,156.40 mi (1,861.05 km) |
| Boulder to Washougal (Washington) | 945.28 mi (1,521.28 km) |
| Boulder to Watauga (Texas) | 664.23 mi (1,068.97 km) |
| Boulder to Waterbury (Connecticut) | 1,678.78 mi (2,701.74 km) |
| Boulder to Waterloo (Illinois) | 815.95 mi (1,313.15 km) |
| Boulder to Waterloo (Iowa) | 690.62 mi (1,111.45 km) |
| Boulder to Watertown (New York) | 1,522.82 mi (2,450.74 km) |
| Boulder to Watertown (South Dakota) | 532.74 mi (857.36 km) |
| Boulder to Watertown (Wisconsin) | 879.59 mi (1,415.57 km) |
| Boulder to Watertown Town (Massachusetts) | 1,767.02 mi (2,843.75 km) |
| Boulder to Waterville (Maine) | 1,830.90 mi (2,946.55 km) |
