answers.input_text: short
answers.span_text: Thames Head , Gloucestershire , UK - elevation 110 m ( 361 ft ) - coordinates 51 ° 41 ′ 39 '' N 2 ° 01 ′ 47 '' W ﻿ / ﻿ 51.694262 ° N 2.029724 ° W ﻿ / 51.694262 ; - 2.029724 Mouth Thames Estuary , North Sea - location Southend - on - Sea , Essex , UK
questions: where did the river thames start and end
name: River Thames
contexts: Thames River The Thames in London Country England Counties Gloucestershire , Wiltshire , Oxfordshire , Berkshire , Buckinghamshire , Surrey , Middlesex , London , Kent , Essex Towns / Cities Cricklade , Lechlade , Oxford , Abingdon , Wallingford , Reading , Henley - on - Thames , Marlow , Maidenhead , Windsor , Staines - upon - Thames , Walton - on - Thames , Kingston upon Thames , Teddington , Richmond , London , London Source - location Thames Head , Gloucestershire , UK - elevation 110 m ( 361 ft ) - coordinates 51 ° 41 ′ 39 '' N 2 ° 01 ′ 47 '' W ﻿ / ﻿ 51.694262 ° N 2.029724 ° W ﻿ / 51.694262 ; - 2.029724 Mouth Thames Estuary , North Sea - location Southend - on - Sea , Essex , UK - elevation 0 m ( 0 ft ) - coordinates 51 ° 29 ′ 56 '' N 0 ° 36 ′ 31 '' E ﻿ / ﻿ 51.4989 ° N 0.6087 ° E ﻿ / 51.4989 ; 0.6087 Coordinates : 51 ° 29 ′ 56 '' N 0 ° 36 ′ 31 '' E ﻿ / ﻿ 51.4989 ° N 0.6087 ° E ﻿ / 51.4989 ; 0.6087 Length 346 km ( 215 mi ) Basin 12,935 km ( 4,994 sq mi ) Discharge for London - average 65.8 m / s ( 2,324 cu ft / s ) - max 370 m / s ( 13,066 cu ft / s ) Discharge elsewhere ( average ) - entering Oxford 17.6 m / s ( 622 cu ft / s ) - leaving Oxford 24.8 m / s ( 876 cu ft / s ) - Reading 39.7 m / s ( 1,402 cu ft / s ) - Windsor 59.3 m / s ( 2,094 cu ft / s ) Map of the Thames within southern England