Puerto Rico Highway 438 (PR-438) is a rural road located entirely in the municipality of San Sebastián, Puerto Rico.

[2] With a length of 1.7 kilometers (1.1 mi),[1] it begins at its intersection with PR-111 on the Eneas–Cidral–Magos tripoint, and ends near PR-111 in Juncal barrio.

[3] The entire route is located in San Sebastián.

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