| On Top of the World Designated Place to Castle Pines (Colorado) | 1,468.52 mi (2,363.36 km) |
| On Top of the World Designated Place to Castle Rock (Colorado) | 1,465.43 mi (2,358.38 km) |
| On Top of the World Designated Place to Castro Valley (California) | 2,351.10 mi (3,783.73 km) |
| On Top of the World Designated Place to Catalina Foothills (Arizona) | 1,708.09 mi (2,748.91 km) |
| On Top of the World Designated Place to Cataño (Puerto Rico) | 1,256.70 mi (2,022.46 km) |
| On Top of the World Designated Place to Cathedral City (California) | 2,030.99 mi (3,268.56 km) |
| On Top of the World Designated Place to Catonsville (Maryland) | 769.70 mi (1,238.71 km) |
| On Top of the World Designated Place to Cave Spring (Virginia) | 576.23 mi (927.36 km) |
| On Top of the World Designated Place to Cayce (South Carolina) | 342.34 mi (550.94 km) |
| On Top of the World Designated Place to Cayey (Puerto Rico) | 1,269.85 mi (2,043.62 km) |
| On Top of the World Designated Place to Cedar City (Utah) | 1,863.53 mi (2,999.06 km) |
| On Top of the World Designated Place to Cedar Falls (Iowa) | 1,085.98 mi (1,747.72 km) |
| On Top of the World Designated Place to Cedar Hill (Texas) | 902.04 mi (1,451.69 km) |
| On Top of the World Designated Place to Cedar Lake (Indiana) | 895.38 mi (1,440.98 km) |
| On Top of the World Designated Place to Cedar Mill (Oregon) | 2,464.24 mi (3,965.82 km) |
