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MTB trails
United Kingdom
Wales
South Wales

St. Thomas

The best MTB trails around St. Thomas

4.7

(48)

1,148

riders

47

rides

Mountain bike trails around St. Thomas offer a diverse landscape for exploration. The region features coastal paths along Swansea Bay, leading to areas like Mumbles Pier. Inland, routes explore reservoir areas and forest paths, providing varied terrain for mountain biking. Elevation changes are present, ranging from flatter coastal sections to more undulating inland trails.

Best mountain bike trails around St. Thomas

  • The most popular mountain bike trail is Lower Lliw Reservoir and Café – Upper Lliw Reservoir loop from Swansea, a 34.5 miles (55.6 km) trail that takes 3 hours 32 minutes to complete, exploring reservoir areas and surrounding hills.
  • Another top favourite among local mountain bikers is Lower Lliw Reservoir and Café – Lower Lliw Reservoir loop from Mynyddbach, a moderate 15.4 miles (24.7 km) path winding through reservoir landscapes and offering views of the water.
  • Local mountain bikers also love the Forest Cycle Path – Forest Stream loop from Llansamlet, a 31.1 miles (50.1 km) trail leading through forested areas and alongside streams, often completed in about 2 hours 46 minutes.
  • Mountain biking around St. Thomas is defined by coastal paths, reservoir areas, and forested trails. The network offers options for various ability levels, from easy coastal rides to more challenging inland loops.
  • The routes in St. Thomas are highly rated by the komoot community with an average score of 4.8 stars from more than 40 reviews. More than 1,100 mountain bikers have used komoot to explore St. Thomas's varied terrain.

Last updated: August 14, 2026

4.0

(1)

19

riders

#1.

Clyne Valley Trail – Clyne Valley Cycle Path loop from Swansea University Singleton Park Campus

15.5km

01:02

160m

160m

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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Easy

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
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Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
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Popular around St. Thomas

National Cycle Network Route 4 — Greenwich to Fishguard

The glorious South Wales coastline by bike — Celtic Trail

Road Cycling Routes around St. Thomas

Cycling around St. Thomas

Running Trails around St. Thomas

Hiking around St. Thomas

Gravel biking around St. Thomas

Other adventures around St. Thomas

National Cycle Network Route 4 — Greenwich to Fishguard

Cycling Collection by

Alice Baddeley

Tips from the Community

Damian Holt
August 17, 2026, Swansea Beach

Lovely stretch of beach right from the marina and stretches all the way to Mumbles Pier. Have a great promenade that covers the full route with plenty to see along the way and lots of options for a coffee, drink and food. Blackpill lido is along this route which is fab for little ones.

1

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Fantastic pub, always a warm welcome from staff and customers. Sometimes has live music too outside.

1

0

Lots of wide pavement around the water, wasn't too busy on a Sunday afternoon but I imagine it gets rammed with people sometimes.

0

0

Trail still here, overgrown and needs some work

1

0

A lovely little cafe for a quick pit stop en route

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0

Grace
June 2, 2025, The Railway Inn

A nice pub along the trail. Great place to meet and finish a bike ride you get get coffee from the little van if it’s open or obvs a post ride pint 🍺

1

0

Grace
March 19, 2025, Swansea Marina

The Marina is a great place to run. It is really flat and you can run past all the boats along the paths. The beach is close by and there are cafes and pubs that you can start or finish it. There's also public toilets there and there is a nice 5k loop or more

0

0

Frequently Asked Questions

How many mountain bike trails are available in St. Thomas?

There are over 50 mountain bike trails around St. Thomas, offering a variety of experiences for different skill levels. The region features a mix of coastal paths, reservoir routes, and forested trails.

What is the overall difficulty of mountain biking in St. Thomas?

The trails in St. Thomas cater to a wide range of abilities. Approximately 16 routes are considered easy, 31 are moderate, and 3 are more challenging, ensuring options for beginners to experienced riders.

Are there easy mountain bike trails suitable for beginners in St. Thomas?

Yes, St. Thomas offers several easy mountain bike trails perfect for beginners. An example is the Swansea Marina – Swansea Bay loop from Llansamlet, which covers 17.2 miles (27.6 km) and offers relatively flat coastal riding.

What are some moderate mountain bike trails in St. Thomas, and how long do they typically take?

Many trails in St. Thomas are moderate. For instance, the Lower Lliw Reservoir and Café – Upper Lliw Reservoir loop from Swansea is a popular moderate route, spanning 34.5 miles (55.6 km) and typically taking around 3 hours 32 minutes. Another option is the Swansea Bay – Mumbles Pier loop from Llansamlet, which is 26.3 miles (42.4 km) and takes about 2 hours 17 minutes.

Are there challenging mountain bike routes for experienced riders in St. Thomas?

While the majority of trails are easy to moderate, there are a few more challenging routes available. These often involve greater elevation changes and more technical sections, particularly in the inland reservoir and forest areas. You can filter for 'difficult' routes on komoot to find these.

Are there many circular mountain bike routes in St. Thomas?

Yes, many of the mountain bike routes in St. Thomas are designed as loops, allowing you to start and finish at the same point. Examples include the Lower Lliw Reservoir and Café – Lower Lliw Reservoir loop from Mynyddbach and the Forest Cycle Path – Forest Stream loop from Llansamlet.

What scenic viewpoints or attractions can I find along mountain bike trails in St. Thomas?

Mountain bike trails in St. Thomas often pass by scenic points. You might encounter coastal views along Swansea Bay, leading towards Bracelet Bay and the Mumbles Lighthouse. Inland routes explore reservoir areas, and some trails offer glimpses of natural features like Penllergare Waterfall or the Rams Tor Headland.

Are there family-friendly mountain bike trails in St. Thomas?

For families, the flatter coastal paths around Swansea Bay are generally suitable. These routes offer easy terrain and pleasant scenery without significant climbs, making them enjoyable for riders of all ages and skill levels.

What do other mountain bikers enjoy the most about mountain biking in St. Thomas?

The area is highly rated by the komoot community, with an average score of 4.8 stars from over 40 reviews. Reviewers often praise the diverse landscape, from coastal paths to tranquil reservoir and forest trails, and the variety of routes suitable for different abilities.

Can I reach mountain bike trails in St. Thomas using public transport?

Many areas in and around St. Thomas are accessible by public transport, particularly within Swansea. It's advisable to check local bus routes and timetables that serve the starting points of specific trails, especially those closer to urban areas or major roads.

Are there mountain bike trails in St. Thomas with convenient parking?

Many trailheads, especially those near popular attractions like reservoirs or coastal areas, typically offer parking facilities. For routes starting further afield, such as those from Mynyddbach or Llansamlet, local parking options are usually available near the starting points.

Most popular routes around St. Thomas

Road Cycling Routes around St. Thomas

Most popular attractions around St. Thomas

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