| Boulder to Troy (Michigan) | 1,157.56 mi (1,862.92 km) |
| Boulder to Troy (Missouri) | 764.05 mi (1,229.62 km) |
| Boulder to Troy (New York) | 1,638.11 mi (2,636.29 km) |
| Boulder to Troy (Ohio) | 1,110.13 mi (1,786.58 km) |
| Boulder to Truckee (California) | 794.44 mi (1,278.52 km) |
| Boulder to Trujillo Alto (Puerto Rico) | 2,767.40 mi (4,453.70 km) |
| Boulder to Trumbull Center (Connecticut) | 1,674.06 mi (2,694.14 km) |
| Boulder to Trussville (Alabama) | 1,119.97 mi (1,802.41 km) |
| Boulder to Tualatin (Oregon) | 960.98 mi (1,546.56 km) |
| Boulder to Tuckahoe (Virginia) | 1,493.07 mi (2,402.86 km) |
| Boulder to Tucker (Georgia) | 1,234.85 mi (1,987.30 km) |
| Boulder to Tucson (Arizona) | 627.68 mi (1,010.16 km) |
| Boulder to Tucson Estates (Arizona) | 633.18 mi (1,019.00 km) |
| Boulder to Tucson Mountains (Arizona) | 625.57 mi (1,006.75 km) |
| Boulder to Tukwila (Washington) | 990.08 mi (1,593.38 km) |
