| Boulder to Arroyo Grande (California) | 903.78 mi (1,454.49 km) |
| Boulder to Artesia (California) | 825.04 mi (1,327.78 km) |
| Boulder to Artesia (New Mexico) | 497.86 mi (801.23 km) |
| Boulder to Artondale (Washington) | 1,000.80 mi (1,610.63 km) |
| Boulder to Arvada (Colorado) | 14.36 mi (23.12 km) |
| Boulder to Arvin (California) | 813.55 mi (1,309.28 km) |
| Boulder to Asbury Lake (Florida) | 1,489.47 mi (2,397.07 km) |
| Boulder to Asbury Park (New Jersey) | 1,641.94 mi (2,642.45 km) |
| Boulder to Ashburn (Virginia) | 1,476.16 mi (2,375.65 km) |
| Boulder to Asheboro (North Carolina) | 1,413.97 mi (2,275.57 km) |
| Boulder to Asheville (North Carolina) | 1,273.07 mi (2,048.80 km) |
| Boulder to Ashland (California) | 920.01 mi (1,480.62 km) |
| Boulder to Ashland (Kentucky) | 1,211.32 mi (1,949.44 km) |
| Boulder to Ashland (Ohio) | 1,204.00 mi (1,937.65 km) |
| Boulder to Ashland (Oregon) | 918.85 mi (1,478.74 km) |
