| Country: | CRI |
| Type: | Secondary |
| Route: | 100 |
| Map Custom: | yes --> |
| Direction A: | West |
| Direction B: | East |
| Provinces: | San José |
| Length Km: | 3.135 |
| Length Round: | 2 |
| Previous Type: | RNS |
| Previous Route: | 257 |
| Next Type: | RNS |
| Next Route: | 101 |
National Secondary Route 100, or just Route 100 (Spanish; Castilian: Ruta Nacional Secundaria 100, or Spanish; Castilian: Ruta 100) is a National Road Route of Costa Rica, located in the San José province.[1]
In San José province the route covers San José canton (Uruca district), Goicoechea canton (Calle Blancos district), Tibás canton (Cinco Esquinas district).