| Country: | CRI |
| Type: | Secondary |
| Route: | 123 |
| Map Custom: | yes --> |
| Direction A: | NORTH/SOUTH/EAST/WEST? |
| Direction B: | NORTH/SOUTH/EAST/WEST? |
| Terminus B: | --> |
| Provinces: | Alajuela, Heredia |
| Length Km: | 11.475 |
| Length Round: | 2 |
| Previous Type: | RNS |
| Previous Route: | 122 |
| Next Type: | RNS |
| Next Route: | 124 |
National Secondary Route 123, or just Route 123 (Spanish; Castilian: Ruta Nacional Secundaria 123, or Spanish; Castilian: Ruta 123) is a National Road Route of Costa Rica, located in the Alajuela, Heredia provinces.[1]
In Alajuela province the route covers Alajuela canton (Alajuela, Desamparados districts).
In Heredia province the route covers Santa Bárbara canton (Santa Bárbara, San Pedro, San Juan districts), Flores canton (San Joaquín, Barrantes, Llorente districts).