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Jersey

Plémont Bay – Grosnez Castle Ruins loop from St Ouen

Routes

Hiking trails & Routes

Jersey

Plémont Bay – Grosnez Castle Ruins loop from St Ouen

Moderate

4.9

(31)

155

hikers

Plémont Bay – Grosnez Castle Ruins loop from St Ouen

04:21

15.8km

260m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: June 18, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Jersey National Park

Waypoints

Start point

Bus stop

Get Directions

2.95 km

Kissing Puffins sculpture at Petit Plémont

Highlight • Monument

Petit Plémont is almost cut off from the rest of the headland by a deep gorge, and the narrow land connection was defended in the Iron Age by a single bank and moat to defend a promontory fortress.

Translated by Google •

Tip by

2.97 km

Plémont Bay

Highlight • Beach

A beautiful secluded bay, but a difficult walk down some steps. Very limited parking.

Translated by Google •

Tip by

5.25 km

Grosnez Castle Ruins

Highlight • Castle

However, it is called Grosnez Castle. It has a magnificent view over the cliffs.

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6.42 km

Les Landes Boardwalk

Highlight • Bridge

A wooden bridge over a swamp keeps feet dry and protects the toads. Toads are the identifying animal of the people of Jersier.

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6.55 km

View of the Pinnacle Settlement

Highlight • Historical Site

Historic site: Ruins visible most likely of a Gallo-Roman temple, but this site has been used as settlement in the neolithic/chalcolithic periods, the Copper Age, Bronze Age and Iron Ago before.

Tip by

7.25 km

Piemont Bay

Highlight • Beach

It is best to walk along the beach at low tide.

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Tip by

12.5 km

Plémont Bay

Highlight • Beach

Plémont Bay is one of the most beautiful bays in Jersey and offers - only at low tide - some caves to explore and also "small pools" for children to …

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Tip by

15.8 km

End point

Bus stop

Way Types & Surfaces

Way Types

11.3 km

2.31 km

1.75 km

460 m

Surfaces

6.35 km

4.94 km

1.94 km

1.57 km

833 m

187 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Weather

Thursday 9 July

30°C

21°C

-- %

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Comments

June 13, 2023,Hike to Grosnez Castle

Greve de Lecq - Grosnez: Superb day out on the coastal path on the north western most point of the island. Beautiful coastline with rugged cliffs & little sandy coves - the one at Plemont is lovely. Lots of up & down on the coastal path some of it stepped it was an easy path to navigate. Grosnez castle is …

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Plémont Bay – Grosnez Castle Ruins loop from St Ouen

Kissing Puffins sculpture at Petit Plémont

Plémont Bay

Grosnez Castle Ruins

Les Landes Boardwalk

View of the Pinnacle Settlement

View of the Jersey Coastline

Piemont Bay

Plémont Bay

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