| State: | PR |
| Type: | PR |
| Route: | 129 |
| Length Km: | 43.2 |
| Established: | 1953[1] |
| Direction A: | South |
| Terminus A: | in Yahuecas |
| Junction: |
|
| Direction B: | North |
| Terminus B: | in Arecibo barrio-pueblo |
| Municipalities: | Adjuntas, Utuado, Lares, Camuy, Hatillo, Arecibo |
| Previous Type: | Ter |
| Previous Route: | 128 |
| Next Type: | Ter |
| Next Route: | 130 |
Puerto Rico Highway 129 (PR-129) is a north - south (actually diagonal) highway in North-Central Puerto Rico, connecting the town of Lares with Arecibo. It crosses the northern karst country of the island. When traveling from the northern coast of Puerto Rico, PR-129 can be used to reach the Arecibo Observatory and the Camuy River Caverns Park.[2]
It is a four-lane, divided highway in Arecibo, and a super two highway in Hatillo, Camuy and Lares. It then merges with PR-111, being entirely unsigned throughout this section. It then heads south as a narrow, rural road, and ends at PR-135 near Adjuntas. Its speed limit is overall 45mi/h through its highway section. It was originally a narrow, two lane road. Much of the original alignment is now PR-134.[3]