National Route 138 (Costa Rica)

National Secondary Route 138, is a road between Route 4 and Route 35, contained in the north plains of the Alajuela province of Costa Rica.

Description
Starting west on Route 4, the road follows a slightly northeast direction towards Route 35. It is the main access route to the Caño Negro Wildlife Refuge. Most of the road is made of gravel, except for an asphalt segment on the west of the road.

Locations
The entire route is in Alajuela province.

History
In May 2020 the segment between Caño Negro Wildlife Refuge and Route 35, was asphalted for a total of 18.2 km.