| Boulder to Richmond (California) | 927.32 mi (1,492.37 km) |
| Boulder to Richmond (Indiana) | 1,076.58 mi (1,732.59 km) |
| Boulder to Richmond (Kentucky) | 1,135.79 mi (1,827.88 km) |
| Boulder to Richmond (Texas) | 899.23 mi (1,447.18 km) |
| Boulder to Richmond (Virginia) | 1,499.95 mi (2,413.93 km) |
| Boulder to Richmond Heights (Florida) | 1,743.73 mi (2,806.26 km) |
| Boulder to Richmond Heights (Ohio) | 1,242.91 mi (2,000.27 km) |
| Boulder to Richmond Hill (Georgia) | 1,445.90 mi (2,326.94 km) |
| Boulder to Richmond West (Florida) | 1,742.11 mi (2,803.66 km) |
| Boulder to Richton Park (Illinois) | 920.58 mi (1,481.53 km) |
| Boulder to Ridge (New York) | 1,692.94 mi (2,724.53 km) |
| Boulder to Ridgecrest (California) | 741.30 mi (1,193.01 km) |
| Boulder to Ridgefield (New Jersey) | 1,635.17 mi (2,631.55 km) |
| Boulder to Ridgefield (Washington) | 966.70 mi (1,555.75 km) |
| Boulder to Ridgefield Park (New Jersey) | 1,634.66 mi (2,630.73 km) |
