National Secondary Route 237, or just Route 237 (Spanish: Ruta Nacional Secundaria 237, or Ruta 237) is a National Road Route of Costa Rica, located in the Puntarenas province.

[1] In Puntarenas province the route covers Buenos Aires canton (Potrero Grande district), Coto Brus canton (San Vito, Aguabuena, Limoncito districts), Corredores canton (Corredor district).

This route was severely damaged in November 2020 due to the indirect effects of Hurricane Eta.

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