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Routes
Mountain biking trails
United Kingdom
Wales
North Wales
Conwy
Trefriw

Gwydir Mawr Trail

Hard

4.8

(74)

1,189

riders

Gwydir Mawr Trail

02:27

24.0km

560m

Mountain biking

Embark on the Gwydir Mawr Trail, a difficult mountain biking adventure spanning 14.9 miles (24.0 km) through the scenic Gwydir Forest. You will encounter a mix of tight, technical singletrack sections, including the famous Creigiau Pandora Singletrack, alongside more open and flowing paths. As you climb forest roads, take in…

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Parc Cenedlaethol Eryri

Waypoints

A

Start point

Parking

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1

8.13 km

Creigiau Pandora Singletrack

Highlight (Segment) • Forest

Red grade. A short rocky section of singletrack. Easily repeatable by using the forest roads.

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2

18.6 km

Gwydir Mawr MTB Trail – Forest Section

Highlight (Segment) • MTB Park

Relatively pleasant undulating part of the route, never too tricky.

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3

21.7 km

Hard for the grade red downhill track. Drops and more await you as part of the finale to the classic Gwydir trails. Often ridden as part of a shorter ride "mini Marin".

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B

24.0 km

End point

Parking

Loading

Way Types & Surfaces

Way Types

12.4 km

11.2 km

352 m

Surfaces

14.0 km

9.10 km

549 m

292 m

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Elevation

Elevation

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

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Weather

Powered by Foreca

Thursday 7 May

14°C

6°C

39 %

Additional weather tips

Max wind speed: 9.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How challenging is the Gwydir Mawr Trail for mountain biking?

The Gwydir Mawr Trail is graded as 'Red' (difficult), making it suitable for proficient mountain bikers with good off-road riding skills. It features a mix of tight, technical, and rocky singletrack sections, alongside flowing parts. Expect significant climbs and descents, requiring a higher level of fitness and stamina.

What kind of terrain can I expect on the Gwydir Mawr Trail?

The trail offers varied and engaging terrain. You'll encounter tight, technical, and rocky singletrack, as well as open and flowing sections. Surfaces can be very variable, including board sections, slippy rocks, large rocks, moderate steps, drops, berms, and water crossings. Most climbs are on forest roads, while descents are primarily on singletrack.

How long does it typically take to complete this mountain biking route?

The Gwydir Mawr Trail is approximately 25 km (15 miles) long. Most riders can expect to complete it in about 2 to 4 hours, depending on their fitness level and how often they stop to enjoy the views.

Is there a shorter option for mountain bikers on this trail?

Yes, for those looking for a shorter but still technical ride, the Gwydir Bach (Welsh for 'small') trail is an 8.7 km (5.4 miles) option. It typically takes between 45 minutes to 1.5 hours and includes two significant climbs that lead to some of the best descents in the area.

Where can I park when visiting the Gwydir Mawr Trail?

Parking is available at the main trailhead for the Gwydir Mawr Trail. For specific directions and up-to-date information on parking facilities, it's advisable to check local resources like visitconwy.org.uk before your visit.

Are dogs allowed on the Gwydir Mawr Trail?

While the Gwydir Mawr Trail is located within Eryri (Snowdonia) National Park, which generally welcomes dogs, it's important to keep them under close control, especially given the nature of a mountain biking trail and potential for livestock or wildlife. Always follow the Countryside Code and local signage regarding dogs.

Do I need any permits or pay an entrance fee to ride the Gwydir Mawr Trail?

No, there are typically no specific permits or entrance fees required to ride the Gwydir Mawr Trail itself. It's freely accessible to the public. However, parking facilities may have a charge.

What is the best time of year to mountain bike the Gwydir Mawr Trail?

The trail can be ridden year-round, but the best time is generally from spring through autumn (April to October) when the weather is milder and the trails are drier. Winter rides are possible but can be very challenging due to wet, muddy, and potentially icy conditions, especially on the technical sections.

What are some notable features or viewpoints along the route?

As you tackle the climbs on forest roads, you'll be treated to spectacular views of the mountains of Eryri (Snowdonia). Key highlights along the way include the technical Creigiau Pandora Singletrack, the Gwydir Mawr MTB Trail – Forest Section, and the thrilling Reid ar Ras Descent.

Does the Gwydir Mawr Trail connect with other mountain biking routes?

Yes, the route intersects with and incorporates sections of several other trails. You'll find it crosses paths with parts of the Snowdonia Slate Trail, Reid Rydd, Pen y Parc, Dwsin Drwg, Reid ar Ras, and Parc a Reid, among others, offering a diverse riding experience.

What makes the Gwydir Mawr Trail a classic mountain biking route?

This trail, formerly known as the Marin Trail, holds historic significance as one of the UK's earliest singletrack mountain bike trails. It's renowned for its challenging and rewarding combination of big climbs, thrilling descents, and varied singletrack, all set within the stunning scenery of Gwydir Forest Park in Eryri (Snowdonia).

Nearby routes

Hard

4.8

1,189

Gwydir Mawr Trail

02:27h

24.0km

560m

Trail Reviews

Paul
October 29, 2023, Gwydir Mawr trail 🚴‍♂️🤪

A beautiful forest and one of the oldest trail center's in the UK. It has been years since I'd ridden this trail and in my opinion there's way too much climbing compared to descending on the route. It's very beautiful and a classic trail but I can't see me returning anytime soon 👍

Blast from my past, brought back some good memories of when I used to ride here regularly. Last 3 descents are definitely the most fun for me.

Awesome trail, alot of uphill fire road climbs which I didn't mind after the last few days riding, but some super fun down hill sections that just keep getting better and better!

Good natural trails, a couple of sections unrideable, up and down, even on EMTB. Saw upto marker post 60 on the red route. This is a tough trail,even compared to the red Llandegla route. Hit the bottom of my GIANT REIGN E motor on rocks a few times. You have been warned!!!🤣

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