Essential information

The trail takes you along the river Severn from Black Rock to the village of Undy. Black Rock Picnic Site (ST 512 881) is off the B4245 road on the edge of Portskewett village.

The route: Along the route not only will you learn a little about Hafren and her links to the river Severn but you will also discover other interesting facts about the local and natural history of this fascinating area of the county. This 6 mile (9.5 kms) flat, linear walk has 3 stiles and 2 step through stiles. It can get muddy in places after heavy rain. Please wear suitable foot wear and take appropriate clothing for the weather. The walk partly follows the newly created Wales Coastal Path (See logo).

The maps: There is a master map showing the whole route with 4 larger scale maps to use in conjunction with the description to help you follow the trail. Click here to view maps.

Travelling by bus: The start and end of the walk can be reached by public transport. For details contact www.traveline.org.uk

Get off the bus at the “Black Rock” bus stop (ST 506 885) on the edge of Portskewett village. (See map 1) At the end get back on the bus at “Church Road” bus stop, Undy (ST 438 874) to return to your destination. (See map 4).

Travelling by car: Leave the A48 (T) old road from Chepstow to Newport at a large roundabout 2.5 miles (4 kms) west of Chepstow following the sign “Caldicot 3, Magor 7 (Portskewett 2).” Very shortly turn left along the road signed “Portskewett 2, Sudbrook 3.” On reaching the outskirts of Portskewett turn left down Black Rock Road (signed “Black Rock Picnic and Lave Net Fishery Site”). Black Rock Picnic Site car park is at the end of the road on your right.

At the end get back on the bus at “Church Road” bus stop (on the opposite side of the road) and ask for the “Black Rock” bus stop. When you get off follow the road back down to the car park.

Travelling by two cars: Follow the B4245 to Undy Village.

If travelling from the Caldicot direction look out for the first road on your left as you enter the village of Undy (signed Church Road). Follow the road over the railway bridge almost immediately bear to your right. The church and car park are on your left after 200 metres (ST 439 869).

If travelling from the Newport direction as the road descends, towards the end of Undy village, take the filter lane on your right into Church Road. Follow the road over the railway bridge almost immediately bear to your right. The church and car park are on your left after 200 metres (ST 439 869).

To get to Black Rock drive back to the B4245, turn right and follow the road through Rogiet and into Caldicot. After a series of traffic lights you will reach a large roundabout. Turn right and follow the road through Portskewett village. As you are leaving the built up area look out for a large house on your right near the national speed limit sign. Take the road to the right (Black Rock road) sign posted “Black Rock Picnic and Lave Net Fishery Site.” Follow the road to reach the Black Rock Picnic Site on your right.

Toilets: There are no public toilets on the route.

Please support local business: Every purchase you make during your visit or on your walk preserves local jobs, facilities and services in the countryside.

Dogs: If you take your dog with you, keep it under control at all times and ensure that it is wormed regularly to avoid infecting livestock.

Places to stay: If you want to stay in the area look at www.visitwyevalley.com or contact the Tourist Information Centre in Chepstow on 01291 623772 or email chepstow.tic@monmouthshire.gov.uk

For more information on the area visit

Magor with Undy Community Council