National Tertiary Route 315, or just Route 315 (Spanish: Ruta Nacional Terciaria 315, or Ruta 315) is a National Road Route of Costa Rica, located in the San José, Cartago provinces.

[1] In San José province the route covers Dota canton (Santa María, Copey districts).

In Cartago province the route covers El Guarco canton (San Isidro district).

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