| Blackrock to Hutchinson (Minnesota) | 3,773.25 mi (6,072.46 km) |
| Blackrock to Hutto (Texas) | 4,610.25 mi (7,419.48 km) |
| Blackrock to Hyattsville (Maryland) | 3,379.81 mi (5,439.28 km) |
| Blackrock to Hybla Valley (Virginia) | 3,394.70 mi (5,463.24 km) |
| Blackrock to Idaho Falls (Idaho) | 4,444.25 mi (7,152.33 km) |
| Blackrock to Idylwood (Virginia) | 3,393.18 mi (5,460.80 km) |
| Blackrock to Ilchester (Maryland) | 3,360.55 mi (5,408.28 km) |
| Blackrock to Immokalee (Florida) | 4,177.07 mi (6,722.34 km) |
| Blackrock to Imperial (California) | 5,144.06 mi (8,278.57 km) |
| Blackrock to Imperial Beach (California) | 5,211.44 mi (8,387.01 km) |
| Blackrock to Independence (Kentucky) | 3,682.16 mi (5,925.87 km) |
| Blackrock to Independence (Missouri) | 4,052.04 mi (6,521.14 km) |
| Blackrock to Indian Trail (North Carolina) | 3,712.01 mi (5,973.91 km) |
| Blackrock to Indiana (Pennsylvania) | 3,392.13 mi (5,459.10 km) |
| Blackrock to Indianapolis (Indiana) | 3,705.49 mi (5,963.41 km) |
