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East Hertfordshire Group

We are the East Hertfordshire Ramblers. We open the way for everyone in our local community to enjoy the pleasures of walking.

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Join the Ramblers and enjoy

  • unlimited free access to 50,000 Ramblers group walks
  • a library jam-packed with thousands of tried-and-tested routes
  • a welcome pack teeming with top tips plus our Walk magazine
  • exclusive discounts from our partners
  • knowing your support is opening up more places to walk and helping more people discover the joy of walking
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Overview

This walk encompasses woodlands, open countryside, a fernery and a visit to Welwyn Roman Baths (Entry fee £6.50 advance booking advisable). 
Starting from Mardley Heath car park we walk to Harmers Green Wood passing the Digswell railway tunnel and air shafts then back to open fields before going under the A1 and the A1000 before proceeding to Welwyn Roman Baths. We then walk into Old Welwyn with its bakeries, cafes, pubs and St Mary’s Church. There is also a memorial to Vincent Van Gogh who walked the 100miles from Ramsgate to Welwyn to visit his sister in 1875/6. 
After a short break we carry on to Danesbury Park estate where we can explore the fernery with its Pulhamite rock garden before continuing through Potters Heath to return to Mardley Heath.  
 

Saturday, 25 April 2026
Start time:
10:00 am
Estimated finish time:
2:00 pm
Difficulty:
Moderate
Distance:
12.1km / 7.5mi
Ascent:
183.2m / 601ft
Type:
circular

The walk is mainly on made up paths with some walking on pavements beside busy roads but it is also quite hilly so requires a reasonable level of fitness. 
if you wish to visit the baths, which are literally under the A1M, please purchase tickets early in advance for the 11 o’clock slot from the website link below. 
If not visiting there are plenty of picnic tables in the grounds outside. 
Toilets are available on site. 
Refreshments available in Welwyn but bringing your own is recommended. 

Features

  • Refreshments available (Pub/cafe)
  • Toilets available
  • Car parking available

Starting point

Grid reference:
TL 24866 18378
Nearest postcode:
AL6 0TP
what3words:
length.splash.again
Start time:
10:00 am

We meet and finish at the Mardley Heath Nature Reserve car park, Heath Lane, Woolmer Green AL6 0TP

Join the Ramblers and enjoy

  • unlimited free access to 50,000 Ramblers group walks
  • a library jam-packed with thousands of tried-and-tested routes
  • a welcome pack teeming with top tips plus our Walk magazine
  • exclusive discounts from our partners
  • knowing your support is opening up more places to walk and helping more people discover the joy of walking