Runnymede is a water-meadow alongside the River Thames in the English county of Surrey, bordering Berkshire and just over 20 miles (32 km) west of central London. It is notable for its association with the sealing of Magna Carta, and as a consequence is, with its adjoining hillside, the site of memorials. Runnymede Borough is named after the area, Runnymede being at its northernmost point.