Penton Hook Marina is the largest inland marina

Marina

A marina is a dock or basin with moorings and supplies for yachts and small boats.A marina differs from a port in that a marina does not handle large passenger ships or cargo from freighters....

 in Britain. It it situated on the River Thames

River Thames

The River Thames flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom. While it is best known because its lower reaches flow through central London, the river flows alongside several other towns and cities, including Oxford,...

 in Surrey

Surrey

Surrey is a county in the South East of England and is one of the Home Counties. The county borders Greater London, Kent, East Sussex, West Sussex, Hampshire and Berkshire. The historic county town is Guildford. Surrey County Council sits at Kingston upon Thames, although this has been part of...

 between Staines

Staines

Staines is a Thames-side town in the Spelthorne borough of Surrey and Greater London Urban Area, as well as the London Commuter Belt of South East England. It is a suburban development within the western bounds of the M25 motorway and located 17 miles west south-west of Charing Cross in...

 and Chertsey

Chertsey

Chertsey is a town in Surrey, England, on the River Thames and its tributary rivers such as the River Bourne. It can be accessed by road from junction 11 of the M25 London orbital motorway. It shares borders with Staines, Laleham, Shepperton, Addlestone, Woking, Thorpe and Egham...

 on the western bank of the river and is close to Thorpe Park

Thorpe Park

Thorpe Park is a theme park located in Chertsey, Surrey, England, UK. It was built in 1979 on the site of a gravel pit which was partially flooded, the intention of creating a water based theme for the park. The park's first large roller coaster, Colossus, was added in 2002...

. It is on the reach above Chertsey Lock

Chertsey Lock

Chertsey Lock is a lock on the River Thames in England, on the northern Middlesex bank near Chertsey in north-west Surrey. The lock is about 200 yards upstream of the picturesque Chertsey Bridge...

 and opposite Penton Hook Island

Penton Hook Island

Penton Hook Island is an island in the River Thames in England adjacent to Penton Hook Lock, near Laleham, Surrey. At this point the natural course of the river makes a large loop or "hook" round the island, although this is now closed off by the weir...

.

The marina is set in 80 acres of what were previously disused gravel pits. It has approximately 600 berths. The marina is downstream from Runnymede

Runnymede

Runnymede is a water-meadow alongside the River Thames in the English county of Berkshire, and just over west of central London. It is notable for its association with the sealing of Magna Carta, and as a consequence is the site of a collection of memorials...

 where King John

King John

The Life and Death of King John, a history play by William Shakespeare, dramatises the reign of John, King of England , son of Henry II of England and Eleanor of Aquitaine and father of Henry III of England...

 signed the Magna Carta

Magna Carta

Magna Carta is an English charter, originally issued in the year 1215 and reissued later in the 13th century in modified versions, which included the most direct challenges to the monarch's authority to date. The charter first passed into law in 1225...

.