4.8
(74)
1,189
riders
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
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Waypoints
Start point
Parking
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8.13 km
Highlight (Segment) • Forest
Tip by
18.6 km
Highlight (Segment) • MTB Park
Tip by
21.7 km
Highlight (Segment) • Forest
Tip by
24.0 km
End point
Parking
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
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Weather
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Thursday 7 May
14°C
6°C
39 %
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Max wind speed: 9.0 km/h
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This route was planned by komoot.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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).
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!!!🤣