National Tertiary Route 304, or just Route 304 (Spanish: Ruta Nacional Terciaria 304, or Ruta 304) 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 Miguel, Rosario districts), Aserrí canton (Salitrillos district).

In Cartago province the route covers Cartago canton (Corralillo district).

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