| Grass Valley to Marysville (California) | 28.88 mi (46.48 km) |
| Grass Valley to Marysville (Ohio) | 1,989.03 mi (3,201.04 km) |
| Grass Valley to Marysville (Washington) | 614.43 mi (988.83 km) |
| Grass Valley to Maryville (Missouri) | 1,387.24 mi (2,232.55 km) |
| Grass Valley to Maryville (Tennessee) | 2,032.51 mi (3,271.00 km) |
| Grass Valley to Mason (Ohio) | 1,951.38 mi (3,140.45 km) |
| Grass Valley to Mason City (Iowa) | 1,466.36 mi (2,359.89 km) |
| Grass Valley to Massapequa (New York) | 2,491.23 mi (4,009.24 km) |
| Grass Valley to Massapequa Park (New York) | 2,492.07 mi (4,010.59 km) |
| Grass Valley to Massillon (Ohio) | 2,076.99 mi (3,342.59 km) |
| Grass Valley to Mastic (New York) | 2,520.57 mi (4,056.47 km) |
| Grass Valley to Mastic Beach (New York) | 2,521.84 mi (4,058.51 km) |
| Grass Valley to Matteson (Illinois) | 1,749.53 mi (2,815.60 km) |
| Grass Valley to Matthews (North Carolina) | 2,220.68 mi (3,573.84 km) |
| Grass Valley to Mattoon (Illinois) | 1,736.96 mi (2,795.37 km) |
