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Cardiff Group

We are the Cardiff 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

Starting at Swanbridge Cross in Sully, Vale of Glamorgan the walk will take the perimeter pathways around Cosmeston Lakes country park to the site of 'Old Cogan' and St. Peter's Church, the lakeside visitor centre and past the medievil village of Cosmeston. On leaving the park, we will head to St. Mary's Well Bay at Lavernock before crossing the tidal causeway to Sully Island and its Ironage encampment before heading back through the Sully sports ground. 

The walk will start from the lay-by at Swanbridge Cross, opposite the Sully Sports and Social Club. There is a direct bus (Cardiff Bus service #94) which departs from the Cardiff Bus Interchange at 09:36, arriving at Swanbridge at 10:13 (re-check times before travelling). Car parking is available in the lay-by or in the nearby streets.

Please be aware that whilst Sully Island offers spectacular views of the Bristol Channel, the causeway crossing is over rocks and can be slippery underfoot. For those not wishing to cross to the island, there is a pub and cafe on the mainland where you can enjoy refreshments and views before re-joining the group. 

Saturday, 23 August 2025
Start time:
10:30 am
Estimated finish time:
3:00 pm
Difficulty:
Moderate
Distance:
11.3km / 7.0mi
Ascent:
N/A
Type:
circular

 

Local grade: C

 

Features

  • Refreshments available (Pub/cafe)
  • Toilets available
  • Accessible by public transport
  • Car parking available
  • Dog friendly
  • No car needed
  • Family-Friendly

Starting point

Grid reference:
ST 16258 67933
Nearest postcode:
CF64 5SD
what3words:
skunks.crimson.enough
Start time:
10:30 am

Lay-by at Swanbridge Cross, South Road, Sully

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