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Morning Brief

Túnel Negro

In Quebradillas (The black tunnel)

The Túnel Negro, also called the Guajataca East Tunnel, is an old railway tunnel about 140 m long in barrio Terranova, Quebradillas, near km 103.9 of PR-2. (Primera Hora)

EasyWalk in, no bookingCommunity-mappedOptional guided walk

How to get in

  • AccessWalk in, no booking; optional guided walk

Hikers may visit the tunnel on their own, as Primera Hora reported in 2025; no source lists a booking or a fee. (Primera Hora)

  • 1.4 mi each way2.2 km, measured along the mapped route
  • 1 h 10 min to 1 h 45 minRound trip, at an easy pace with stops
  • 156 ftOf climb: 115 ft going in, 41 ft coming back
  • TrailheadOff PR-2 near km 103.9, barrio Terranova, Quebradillas
  • ParkingA parking area about 260 ft from the trailhead

We read its page (Veredas PR) on Oct 16, 2026; it lists no closure.

Route from OpenStreetMap's volunteer mappers. No agency posts conditions for this route: ask locally before you go.

Directions to the trailhead

Before you go

  • The tunnel has no lighting: bring a flashlight. (Primera Hora)
  • Insects and bats may live inside the tunnel. (Primera Hora)
  • In 2015 the lessee of the farmland the path crosses had blocked it with logs and mounds of earth: ask locally whether the way is open. (Primera Hora)

Add when and where from: Sunday morning from Guaynabo

Highlights

  • Túnel Negro0.7 mi inA tunnel

Where it goes

Skip the map
Altos de San LuisÁrbol Solitario (Cerro de los Cielos)Ballena trail (Guánica Dry Forest)Bisley TrailBosque Seco de Las CabezasCaminata al Faro de Puerto FerroCaminata Albergue OlímpicoCaminata del Túnel GuajatacaCaminata El MorrilloCaminata El Pesca'oCaminata Faro Los Morrillos to Playa SuciaCaminata La SollerCaminata por TortugueroCamino al Charco El MangóCamino Cerro de PuntaCamino hacia el Morro de HumacaoCamino Monte PirataCamino San MiguelCamino Túnel de GuaniquillaCaminos Corredor Ecológico del NoresteCaminos de Monte Pirata Cabo RojoCañón BlancoCañón San CristóbalCerro Playuela trailCharco El MorónCueva trail (Guánica Dry Forest)El Conuco-Monte del OréganoEl SalitralEl TrenGuaniquilla Point LoopHiking through the Military BunkersHumedal Los MachosLa EsperanzaLago Toa VacaLaguna Cartagena Hiking TrailLaguna GrandeLas CaobasLluberas TrailLos AlmácigosLos Tres PicachosMalecón de CatañoPaseo Lineal Río BayamónPlaya María to Faro de RincónPlaya Novillo to Ensenada PirataPuerto Mosquito TrailPunta Borinquen TrailPunta GuaniquillaRecorrido Autoguiado Reserva Natural Estuarina de la Laguna del CondadoRecorrido Costa AreciboRefugio de Vida Silvestre BoquerónRío Sabana TrailRuta Puerto MosquitoSalto CuretSeven Seas to Playa Colorá and Playa EscondidaSurvival BeachVereda del Río Grande de ManatíVereda Interpretativa Bosque de JagüeyesVereda NavíoVereda Puente de Hamaca del Lago GarzasTúnel NegroTúnel Negro trailhead: Off PR-2 near km 103.9, barrio Terranova, Quebradillas

Distance1.4 miElevation5–117 ftClimb, round trip+156 ft

Start, 38 ft1.4 mi, 116 ft

  • Easy
  • Moderate
  • Trailhead
  • Parking
  • Other sight

Map: © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap

Good day to hike it?

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Checking today’s conditions…

Weather data by Open-Meteo.com (CC BY 4.0)

What to bring

  • Water
  • Shoes with grip
  • Charged phone

Along the way

The Río Guajataca below the old bridge
The Río Guajataca below the old bridge.
An old steel bridge over the Río Guajataca
An old steel bridge over the Río Guajataca.
The coast at Terranova, Quebradillas
The coast at Terranova, Quebradillas.

Further reading

Photo credits