| Country: | CRI |
| Type: | Tertiary |
| Route: | 409 |
| Map Custom: | yes --> |
| Direction A: | NORTH/SOUTH/EAST/WEST? |
| Direction B: | NORTH/SOUTH/EAST/WEST? |
| Terminus B: | --> |
| Provinces: | San José, Cartago |
| Length Km: | 8.675 |
| Length Round: | 2 |
| Previous Type: | RNT |
| Previous Route: | 408 |
| Next Type: | RNT |
| Next Route: | 411 |
National Tertiary Route 409, or just Route 409 (Spanish; Castilian: Ruta Nacional Terciaria 409, or Spanish; Castilian: Ruta 409) is a National Road Route of Costa Rica, located in the San José, Cartago provinces.[1]
In San José province the route covers Desamparados canton (San Antonio district).
In Cartago province the route covers La Unión canton (Tres Ríos, San Diego, Río Azul districts).