| Boulder to Glen Carbon (Illinois) | 819.05 mi (1,318.14 km) |
| Boulder to Glen Cove (New York) | 1,654.72 mi (2,663.02 km) |
| Boulder to Glen Ellyn (Illinois) | 904.51 mi (1,455.67 km) |
| Boulder to Glen Rock (New Jersey) | 1,628.20 mi (2,620.33 km) |
| Boulder to Glendale (Arizona) | 589.00 mi (947.90 km) |
| Boulder to Glendale (California) | 820.80 mi (1,320.95 km) |
| Boulder to Glendale (Wisconsin) | 918.95 mi (1,478.91 km) |
| Boulder to Glendale Heights (Illinois) | 903.87 mi (1,454.63 km) |
| Boulder to Glendora (California) | 803.17 mi (1,292.58 km) |
| Boulder to Glenmont (Maryland) | 1,497.90 mi (2,410.64 km) |
| Boulder to Glenn Dale (Maryland) | 1,511.87 mi (2,433.12 km) |
| Boulder to Glenn Heights (Texas) | 696.04 mi (1,120.16 km) |
| Boulder to Glenpool (Oklahoma) | 576.52 mi (927.83 km) |
| Boulder to Glens Falls (New York) | 1,637.11 mi (2,634.67 km) |
| Boulder to Glenvar Heights (Florida) | 1,743.04 mi (2,805.15 km) |
