Things To Do

Grosnez Castle

La Route De Grosnez, St. Ouen, Jersey, JE3 2AD

Rating: 4.5 ★ (528 ratings)

Details

Grosnez Castle is a ruined 14th-century castle located in St Ouen, in the north-west corner of Jersey in the Channel Islands. It was built around 1330 under the instruction of Sir John des Roches, primarily to offer a place of refuge for local farmers from French attacks. The castle's name, Grosnez, is believed to originate from the Old Norse words "grar nes," meaning "grey headland," which accurately describes its appearance from the sea, rather than the French translation of "big nose."

The castle's strategic position on a clifftop approximately 60 meters (200 feet) above the sea provided natural defenses on three sides, with a man-made ditch cut into the rock protecting the landward side. Despite these defenses, the French captured the castle in 1373 and again in 1381. It has been a ruin since the mid-16th century, with the gatehouse being the most substantial remaining structure. Today, the ruins are open to the public free of charge and offer breathtaking views, especially at sunset, across to Guernsey, Sark, and France on clear days.

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Location

Opening Hours

Open to the public at any time.

Contact

01534 445500

Comments

Lazy Leopard
30 Jan 2026
3.0 ★
If you're looking for a challenging climb or stunning scenery, this might not be the spot. However, for a relaxing walk in nature, it's perfectly pleasant. 🚶‍♀️
Maria “Local Guide” Opara
16 Jan 2026
5.0 ★
The place was amazing because of its history and you can imagine where you were walking how many people had been there when it was first built and how interesting this place is.
Thurso Lass
10 Jan 2026
4.0 ★
Not much left of the castle. However the area is stunning and very peaceful. Worth a detour if you are in the area.
Ben Jung
3 Jan 2026
5.0 ★
The remains of the castle are very minimal, but the area is stunning. I think this is my favourite part of the island. Lovely heathland and bird life.

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