| Blackrock to Jeffersonville (Indiana) | 3,756.51 mi (6,045.51 km) |
| Blackrock to Jenison (Michigan) | 3,548.20 mi (5,710.28 km) |
| Blackrock to Jenks (Oklahoma) | 4,268.03 mi (6,868.72 km) |
| Blackrock to Jennings (Missouri) | 3,914.85 mi (6,300.35 km) |
| Blackrock to Jensen Beach (Florida) | 4,086.30 mi (6,576.27 km) |
| Blackrock to Jericho (New York) | 3,160.30 mi (5,086.02 km) |
| Blackrock to Jerome (Idaho) | 4,564.27 mi (7,345.48 km) |
| Blackrock to Jersey City (New Jersey) | 3,184.57 mi (5,125.08 km) |
| Blackrock to Jessup (Maryland) | 3,364.09 mi (5,413.99 km) |
| Blackrock to Johns Creek (Georgia) | 3,905.85 mi (6,285.86 km) |
| Blackrock to Johnson City (New York) | 3,198.68 mi (5,147.77 km) |
| Blackrock to Johnson City (Tennessee) | 3,720.53 mi (5,987.62 km) |
| Blackrock to Johnston (Iowa) | 3,901.61 mi (6,279.03 km) |
| Blackrock to Johnstown (Colorado) | 4,372.01 mi (7,036.06 km) |
| Blackrock to Johnstown (Pennsylvania) | 3,396.17 mi (5,465.61 km) |
