| Grass Valley to Monticello (Minnesota) | 1,447.47 mi (2,329.48 km) |
| Grass Valley to Montrose (Colorado) | 711.23 mi (1,144.62 km) |
| Grass Valley to Moody (Alabama) | 1,948.10 mi (3,135.16 km) |
| Grass Valley to Moore (Oklahoma) | 1,319.86 mi (2,124.11 km) |
| Grass Valley to Moorestown-Lenola (New Jersey) | 2,426.43 mi (3,904.96 km) |
| Grass Valley to Mooresville (North Carolina) | 2,203.94 mi (3,546.90 km) |
| Grass Valley to Moorhead (Minnesota) | 1,329.11 mi (2,138.99 km) |
| Grass Valley to Moorpark (California) | 361.76 mi (582.19 km) |
| Grass Valley to Moraga (California) | 111.52 mi (179.47 km) |
| Grass Valley to Moreno Valley (California) | 423.74 mi (681.95 km) |
| Grass Valley to Morgan City (Louisiana) | 1,813.47 mi (2,918.50 km) |
| Grass Valley to Morgan Hill (California) | 148.00 mi (238.18 km) |
| Grass Valley to Morganton (North Carolina) | 2,154.02 mi (3,466.56 km) |
| Grass Valley to Morgantown (West Virginia) | 2,174.34 mi (3,499.27 km) |
| Grass Valley to Morris (Illinois) | 1,715.28 mi (2,760.48 km) |
