Castle on the Wey Navigation & Basingstoke Canal

Guide To King John’s Castle

Built by King John in 1207, King John's Castle was a three-storey octagonal tower (the only one in England) built for the pleasure of the king (hunting, etc.) rather than as a fortress, although it was held to good effect by a handful of men for a week in 1216 against the French. 

It was in 1215 that King John set out from here to sign the Magna Carta.

King John’s Castle
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4.7 out of 5 stars (based on 18 reviews)
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More On & About The Wey Navigation & Basingstoke Canal

King John’s Castle Information


North Warnborough, Hook RG29 1HQ

Opening Hours

Monday: Open 24 hours

Tuesday: Open 24 hours

Wednesday: Open 24 hours

Thursday: Open 24 hours

Friday: Open 24 hours

Saturday: Open 24 hours

Sunday: Open 24 hours

NOTE: Venues often have seasonal opening hours or can be subject to change and kitchen hours are often shorter, so it's always wise to check with the venue before visiting.

King John’s Castle Reviews

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Review from Google Places

2 August 2025

Remains of a royal castle built in the 13th century within a bend on the south side of the River Whitewater. Built on the orders of king John parts of a flint keep remain inside one of two moated enclosures. Documentary evidence shows that it was built between 1207-1212, it was besieged by the French in 1216 and badly damaged. It needed to be repaired and it is likely that the keep was then built , three stories high and of octagonal shape,. Parts of the moats have been removed with the building of the Basingstoke Canal.

stephen mudie

Review from Google Places

9 July 2025

We walked along the canal and followed the brown signs to ‘castle’.

A little tucked away, but a lovely ruin.

Plenty of signs explaining the history of the castle.

Definitely worth going to see.

We also saw a few paddleboarders.

Elaine Wickwar

Review from Google Places

20 May 2025

What a great little side visit, was not a planned visit and happened to be passing. Parking nearby is very limited but found somewhere about 5 mins away. Canal side approach was very pretty. Castle is free to access, literally a 5 to 10 minute time period is sufficient at the castle as it is both small and a ruin but there are seem information boards to read.

Chris Page

Review from Google Places

20 March 2025

King John’s castle sounds so much better than Odiham castle. To reach the site is an easy walk alongside the Basingstoke canal.

Steve Attwood

Review from Google Places

8 February 2025

Great nice little walk along the canal then to the right is the Castle remains itself. Nice little day out and alot of history to learn from the Plaque’s too. Worth a visit if your down in these neck of the woods 👍🏼

Jam Masta J

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