Burnham Green, Digswell and the River Mimram Valley Walk
This circular walk visits the Hertfordshire villages of Burnham Green, Digswell and Tewin.
On the way you will enjoy pleasant views of the River Mimram which runs through the area. You can start and finish the walk from Digswell which has a train station just to the north of Welwyn Garden City.
The route runs for just over 6 miles, passing along a series of public footpaths and quiet country lanes. There are some small climbs with great views over the surrounding countryside from the high points.
You can continue your walking in the area by picking up the circular Welwyn Garden City Centenary Walk which also starts from Digswell train station.
Burnham Green and the River Mimram Valley Circular Walk Ordnance Survey Map 
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Burnham Green and the River Mimram Valley Circular Walk Open Street Map 
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Burnham Green and the River Mimram Valley Circular Walk OS Map 
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Burnham Green and the River Mimram Valley Circular Walk Open Street Map 
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Photos
Burnham Green Triangulation Pillar
Digswell Viaduct as seen from Digswell Park Road. It was designed by William Cubitt and took two years to build. Queen Victoria opened it in 1850. The viaduct is around 1,560ft (475m) long and comprises forty arches of 30ft (9.1m) span, and is 100ft (30m) high from ground level to trackbed. It is built of brick fired from brick clay quarried on site during construction.
River Mimram,Tewin Bury Farm
River Mimram at Archer's Green