Pors Hir Harbor, Plougrescant – Guindy Aqueduct loop from Tréguier

Mountain biking trails

Pors Hir Harbor, Plougrescant – Guindy Aqueduct loop from Tréguier

Moderate

4.4

(17)

riders

Pors Hir Harbor, Plougrescant – Guindy Aqueduct loop from Tréguier

02:47

38.4km

440m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is accessible with public transport.

Last updated: August 21, 2026

Tips

Cycling is not permitted along parts of this route

After 17.1 km for 291 m

After 25.7 km for 198 m

After 26.1 km for 236 m

Waypoints

Start point

Bus stop

Get Directions

1.34 km

Old Town of Tréguier

Highlight • Historical Site

Stroll through town, leave your bike behind.

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Tip by

11.0 km

The Bay of Hell delimits the municipalities of Plouguiel and Plougrescant. This small, deep and quiet area is an ideal retreat for wintering birds. Indeed, its position protects it from the dominant "blows of tobacco" coming from the northwest.
It is known to have been the scene of a maritime tragedy recounted in his writings by the famous Trégorrois poet Anatole Le Braz. (brittany-cotedegranitrose.com)
Ps: the surrounding hills are also hellish to climb!

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15.8 km

Pors Hir Harbor, Plougrescant

Highlight • Structure

This harbor was built between the large rocks near an inlet. The road runs along the scenic coast. The houses are built directly against the rocks or are hidden between huge boulders.

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17.3 km

Castel Meur - House Between Two Rocks

Highlight • Other

The house is great. It stands in a protected area; one cannot leave the paths. The house is privately owned, as is the road to it. barrier closed. So you have to be content with a view from about 100 meters away.

The landscape there is beautiful. Great coastal scenery with the largest rock formations in the area.

Parking and public toilets are available. But no rest stops far and wide.

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19.9 km

Pors Scaff Beach

Highlight • Beach

Facing the Iles Yvinec and Iles des Pins, is Pors Scaff beach in Plougrescant with its mooring area. The main beach is made up of sand and pebbles.

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24.3 km

Old cart track on Istan Island

Highlight (Segment) • Other

Only possible at low tide

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35.5 km

Kerdéozer viaduct/bridge

Highlight • Other

The Kerdéozer viaduct was built by Louis Auguste Harel de La Noë for the Côtes-du-Nord railways. It is located in the town of Plouguiel. It was used by the Tréguier - Perros and Lannion line (Petit-Camp disconnection), put into service in 1906, it was decommissioned in 1949 (wikipedia) 🚂

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36.5 km

Guindy Aqueduct

Highlight • Other

Aqueduct over the Guidy River near Minihy-Tréguier
The eastern end is private property. To visit from the west (left) shore.
Beautifully situated in a picturesque valley on the river, which widens slowly here. The ebb and flow of the sea are affecting up to here.

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Tip by

38.4 km

End point

Bus stop

Way Types & Surfaces

Way Types