Marlow By-pass Bridge is a road bridge across 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 England. It carries the A404 road

A404 road

The A404 is a road in the United Kingdom that starts at Paddington in London and leads to Maidenhead in Berkshire.The road initially follows a course through London and its suburbs including Harlesden, Wembley, Harrow Pinner, and Rickmansworth...

 between Maidenhead

Maidenhead

Maidenhead is a town and unparished area within the Royal Borough of Windsor and Maidenhead, in Berkshire, England. It lies on the River Thames and is situated west of Charing Cross in London.-History:...

, Berkshire

Berkshire

Berkshire is a historic county in the South of England. It is also often referred to as the Royal County of Berkshire because of the presence of the royal residence of Windsor Castle in the county; this usage, which dates to the 19th century at least, was recognised by the Queen in 1957, and...

 and High Wycombe

High Wycombe

High Wycombe , commonly known as Wycombe and formally called Chepping Wycombe or Chipping Wycombe until 1946,is a large town in Buckinghamshire, England. It is west-north-west of Charing Cross in London; this figure is engraved on the Corn Market building in the centre of the town...

, Buckinghamshire

Buckinghamshire

Buckinghamshire is a ceremonial and non-metropolitan home county in South East England. The county town is Aylesbury, the largest town in the ceremonial county is Milton Keynes and largest town in the non-metropolitan county is High Wycombe....

. and crosses the Thames on the reach between Cookham Lock

Cookham Lock

Cookham Lock is a lock with weirs situated on the River Thames near Cookham, Berkshire. The lock is set in a lock cut which is one of four streams here and it is surrounded by woods. On one side is Sashes Island and on the other is Mill Island connected to Formosa Island, the largest on the...

 and Marlow Lock

Marlow Lock

Marlow Lock is a lock and weir situated on the River Thames in the town of Marlow, Buckinghamshire, England. The first pound lock was built by the Thames Navigation Commission in 1773.The weir stretches a long way upstream above the lock.-History:...

.

The bridge forms part of the Marlow

Marlow, Buckinghamshire

Marlow is a town and civil parish within Wycombe district in south Buckinghamshire, England...

 by-pass

Bypass (road)

A bypass is a road or highway that avoids or "bypasses" a built-up area, town, or village, to let through traffic flow without interference from local traffic, to reduce congestion in the built-up area, and to improve road safety....

to the east of the town. It was built in 1972.

The area underneath the bridge is used for boat storage by the adjacent Scout Water Centre at Longridge.