4.8
(4)
91
riders
4
rides
Gravel biking around Llyn Trawsfynydd offers diverse terrain within Snowdonia National Park, centered around a large man-made reservoir. The landscape features a mix of gravel paths, tarmac, and mud tracks, with views of the Rhinogs mountains and dense woodlands. This area provides varied elevation gains and surfaces, catering to different skill levels for no traffic gravel bike trails.
Last updated: June 29, 2026
4.5
(2)
33
riders
16.3km
01:21
320m
320m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
15
riders
34.5km
02:33
620m
620m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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26
riders
9.83km
00:42
120m
130m
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
5.0
(1)
17
riders
11.4km
00:53
200m
190m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Llyn Trawsfynydd
If you smile sweetly you don’t have to pay. There are also public toilets just after this.
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Card payments are accepted. The bridge is open to cyclists and walkers 24/7. There is a slot for the toll in the door outside of operating hours.
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They do take card payments so that’s been an update but it’s not open 24 hrs
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Make sure you have cash for the toll - no card payment here😉
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Coed y Brenin was Britain's first purpose-built mountain biking center and it remains one of the sport's top destinations. Eight purpose-built mountain bike trails start at the visitor center and range from easy trails for families and beginners to technical trails for experienced mountain bikers. Other facilities for mountain bikers include a bike shop and a skills room where you can develop your riding techniques. The visitor center is also the starting point for walking and running trails through the Coed y Brenin Forest Park, as well as orienteering courses and geocaching. Two of the walking routes are suitable for visitors who use an off-road mobility scooter. There are also children's play areas, a café and plenty of picnic tables. (https://naturalresources.wales/days-out/places-to-visit/north-west-wales/coed-y-brenin-visitor-centre/?lang=en)
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There are 4 dedicated no-traffic gravel bike trails detailed in this guide for the Llyn Trawsfynydd area, catering to various skill levels from easy to difficult.
The area is highly rated by the komoot community, with an average score of 4.75 stars. Reviewers often praise the stunning views of the lake and the surrounding Snowdonian landscape, as well as the variety of terrain that makes for an engaging ride.
Yes, the region is known for its circular routes. The lake itself features an 8-mile loop that combines gravel paths with other surfaces, offering scenic views. While not all routes in this guide are strictly circular around the lake, many are designed as loops, such as the Coed y Brenin Visitor Centre – Tarw Du Trail Entrance loop from Afon Mawddach.
Absolutely. For an easier ride suitable for all fitness levels, consider the The Slipway – Tarw Du Trail Entrance loop from Afon Mawddach. This route is classified as easy and offers a great introduction to gravel biking in the area.
The trails around Llyn Trawsfynydd offer a range of difficulties. You'll find easy routes like The Slipway – Tarw Du Trail Entrance loop, moderate options such as Tarw Du Trail Entrance – The Foundry Skills Area loop, and more challenging rides like the Penmaenpool Toll Bridge – Penmaenpool Toll Bridge loop, which requires good to very good fitness due to significant elevation gains.
The area is rich in both natural beauty and historical sites. You can expect views of the majestic Rhinogs mountains and, on clear days, the high peaks of Snowdonia. Notable landmarks include the striking Trawsfynydd Nuclear Power Station, the historic Maentwrog Dam, and the beautiful Llyn Trawsfynydd itself. The region also features ancient Roman forts and preserved historical farmhouses.
Yes, there are various parking options available, particularly near popular trailheads and visitor centers. For example, routes starting from areas like Coed y Brenin or near The Slipway will typically have designated parking facilities.
Spring and autumn generally offer the most pleasant conditions for gravel biking in Llyn Trawsfynydd, with milder temperatures and beautiful scenery. Summer is also popular, but trails can be busier. Winter riding is possible but be prepared for colder, wetter weather and potentially muddy sections.
Yes, the village of Trawsfynydd and surrounding areas offer options for refreshments and accommodation. You'll find local cafes and pubs, as well as guesthouses and B&Bs, providing convenient stops before or after your ride.
Many trails in Snowdonia National Park are dog-friendly, but it's always best to check specific route details or local signage. When cycling with dogs, ensure they are well-behaved, under control, and that you carry waste bags. Be mindful of livestock and other trail users.
While public transport options exist within Snowdonia, direct access to all trailheads by public transport can be limited. It's advisable to research bus routes and schedules to see if they align with your chosen starting point. Combining public transport with a short ride to the trailhead is often a viable option.
The terrain around Llyn Trawsfynydd is diverse, ranging from well-maintained gravel paths to tarmac sections and some potentially muddy tracks, especially after rain. You'll encounter a mix of flat sections and significant climbs, offering varied challenges and scenic rewards.


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