Routes Planner Features Updates

Login or Signup

Login or Signup

Login or Signup

Hiking trails & Routes

Vale of Glamorgan

Porthkerry Viaduct – The Knap loop from St Athan

Hiking trails & Routes

Vale of Glamorgan

Porthkerry Viaduct – The Knap loop from St Athan

Hard

4.3

(3)

18

hikers

Porthkerry Viaduct – The Knap loop from St Athan

06:39

25.2km

230m

Hiking

Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: August 21, 2026

Waypoints

A

Start point

Parking

2.29 km

Watch House Beach

Beach

2

2.41 km

Aberthaw Lime Works

Highlight • Historical Site

This industrial building looks proudly over the surrounding landscape, haring bark to another time

Tip by

3

5.17 km

Bench with View of Rhoose Lagoon

Highlight • Lake

Perfect bench for enjoying lunch and looking out over the cliffs

Tip by

4

5.29 km

Rhoose Point – Southernmost Point of Mainland Wales

Highlight • Viewpoint

Located near the village of Rhoose in the stunning Vale of Glamorgan, Rhoose Point (Welsh: Trwyn y Rhws) stands as a captivating headland and settlement. Nestled in the southernmost reaches …

Tip by

5

6.10 km

Bench With a View of the Sea

Highlight • Viewpoint

6

8.42 km

Porthkerry Viaduct

Highlight • Historical Site

The marvellous 16-arch Porthkerrry Viaduct stands at a whopping 110 feet (33m) high. It was designed and engineered by James and William Szlumper and was originally built to carry coal …

Tip by

7

15.2 km

The Knap

Highlight • Settlement

I love a duck so stood tall. Lovely area

Tip by

8

15.6 km

Cold Knap Roman Site

Highlight • Historical Site

The monument consists of the remains of a Roman rectangular courtyard building dating to the 2nd or 3rd centuries AD.

It is located close to the beach at Cold Knap …

Tip by

9

19.7 km

Rhoose Point

Highlight • Natural Monument

B

25.2 km

End point

Parking

Way Types & Surfaces

Way Types

11.9 km

7.96 km

3.20 km

2.02 km

152 m

Surfaces

8.50 km

6.99 km

6.13 km

1.92 km

1.64 km

< 100 m

Sign up to see more specific route details

Sign up for free

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Sign up to see more specific route details

Sign up for free

Weather

Powered by Foreca

Tuesday 20 October

13°C

9°C

65 %

Additional weather tips

Max wind speed: 44.0 km/h

to get more detailed weather forecasts along your route

Comments

Want to know more?

Sign up for a free komoot account to join the conversation.

Sign up for free

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

Navigate Send to Phone

Move start point

Embed on a website

Report an Issue

Report restricted access

Nearby routes

4.7

744

Brean Down loop — English Coast Path

01:14h

4.33km

100m

4.6

383

Roath Park loop via Roath Pleasure Gardens

01:27h

5.65km

20m

4.6

265

Cwm George & Casehill Woods loop from Dinas Powys

02:45h

9.90km

180m

3.9

211

Castle Coch loop from Taffs Well

01:47h

6.16km

160m

3.8

128

Castle Coch and Craig Yr Allt loop

02:44h

9.18km

290m

4.9

114

Countisbury and Brendon loop

04:56h

16.8km

460m

4.7

87

Dunster Castle, Bat's Castle & Gallox Bridge loop from Dunster — Exmoor National Park

01:59h

6.64km

210m

4.8

110

Dunkery Beacon & Great Rowbarrow loop from Dunkery Gate

01:29h

5.01km

140m

4.4

85

The Garth from Taffs Wells via Pentrych Woods

02:26h

7.80km

300m

4.4

84

Caerphilly Mountain and Rhymney Ridgeway Loop

02:14h

7.78km

190m

4.6

119

Kilve Oil Works, Kilve Beach & East Quantoxhead loop

01:24h

5.22km

60m

4.8

109

Southerndown to Ogmore-by-Sea loop — Glamorgan Heritage Coast

02:33h

9.42km

130m