National Tertiary Route 318, or just Route 318 (Spanish: Ruta Nacional Terciaria 318, or Ruta 318) is a National Road Route of Costa Rica, located in the San José, Puntarenas provinces.

[1] In San José province the route covers Puriscal canton (Chires district).

In Puntarenas province the route covers Parrita canton (Parrita district).

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