| San Marcos to Camarillo (California) | 130.61 mi (210.20 km) |
| San Marcos to Camas (Washington) | 905.36 mi (1,457.03 km) |
| San Marcos to Cambridge (Maryland) | 2,312.50 mi (3,721.60 km) |
| San Marcos to Cambridge (Massachusetts) | 2,562.59 mi (4,124.09 km) |
| San Marcos to Camden (Arkansas) | 1,401.15 mi (2,254.93 km) |
| San Marcos to Camden (New Jersey) | 2,359.75 mi (3,797.65 km) |
| San Marcos to Cameron Park (California) | 438.06 mi (704.98 km) |
| San Marcos to Camp Pendleton South (California) | 14.34 mi (23.08 km) |
| San Marcos to Camp Springs (Maryland) | 2,266.23 mi (3,647.15 km) |
| San Marcos to Camp Verde (Arizona) | 320.80 mi (516.27 km) |
| San Marcos to Campbell (California) | 393.37 mi (633.07 km) |
| San Marcos to Campbellsville (Kentucky) | 1,810.50 mi (2,913.71 km) |
| San Marcos to Campton Hills (Illinois) | 1,679.24 mi (2,702.47 km) |
| San Marcos to Canby (Oregon) | 888.00 mi (1,429.10 km) |
| San Marcos to Candelaria (Puerto Rico) | 3,295.44 mi (5,303.49 km) |
