4.5
(2)
6
riders
02:20
36.5km
370m
Cycling
Cycle the moderate Bwlch Mawr loop from Trefor, covering 22.7 miles (36.5 km) with stunning views across the Llŷn Peninsula.
Last updated: February 26, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
AHNE Llŷn
Waypoints
Start point
Parking
Get Directions
909 m
Highlight • Viewpoint
Tip by
17.5 km
Highlight • Cycleway
21.7 km
Highlight • River
Tip by
36.5 km
End point
Parking
Way Types & Surfaces
Way Types
20.6 km
14.2 km
924 m
817 m
< 100 m
Surfaces
31.7 km
3.91 km
924 m
< 100 m
Sign up to see more specific route details
Sign up for free
Elevation
Highest point (170 m)
Lowest point (20 m)
Sign up to see more specific route details
Sign up for free
Weather
Powered by Foreca
Tuesday 12 May
13°C
7°C
65 %
Additional weather tips
Max wind speed: 39.0 km/h
to get more detailed weather forecasts along your route
This route was planned by komoot.
This route is rated as a moderate touring bicycle ride. While it's generally accessible, good fitness is required for the approximately 36.5 km (22.7 miles) distance and 370 meters (1,214 feet) of elevation gain. Some moderate routes in the region might include unpaved sections, so be prepared for varied terrain.
The terrain is primarily characterized by mostly paved surfaces, making it suitable for touring bikes. However, as it's a moderate route, some segments might be unpaved and potentially more challenging. The loop circulates the high hills of Bwlch Mawr, Gyrn Goch, and Gyrn Ddu, often utilizing narrow and quiet roads.
You can expect stunning and dramatic scenery with expansive views across the Llŷn Peninsula. Highlights include incredible vistas of both mountains and the sea, occasionally complemented by bright pink foxgloves. From higher points, you'll get superb views of Snowdonia (Eryri), the Nantlle Ridge, and the coast, including Yr Eifl. You'll also pass by Trefor Beach and cross the Bridge Over Afon Dwyryd.
While specific parking locations for the Bwlch Mawr loop in Trefor are not detailed, Trefor is a small village on the Llŷn Peninsula. You may find roadside parking or small public car parks within the village. It's always a good idea to arrive early, especially during peak season, to secure a spot.
The Llŷn Peninsula offers beautiful scenery year-round, but for cycling, spring and summer (May to September) generally provide the most pleasant weather conditions. You'll experience longer daylight hours and a higher chance of clear skies for enjoying the expansive views.
No, there are no specific permits or entrance fees required to cycle the Bwlch Mawr loop. The route is on public roads and paths within the Llŷn Area of Outstanding Natural Beauty (AONB). However, always respect local regulations and private land.
As this is primarily a touring bicycle route utilizing public roads and cycle paths, dogs are generally permitted if kept under control. However, always be mindful of traffic, livestock, and local signage, especially when passing through rural areas or near farms. If you plan to stop at any specific attractions, check their individual dog policies.
Yes, the route intersects with several other paths. Notably, it covers significant sections of the EuroVelo 2 - Capitals Route - part United Kingdom 1, Lôn Las Cymru (North), and Lôn Eifion. It also briefly connects to the National Cycle Network Route 8 and the Llŷn Coastal Path.
The Bwlch Mawr loop is located within the stunning Llŷn AONB. When cycling here, please respect the natural environment by staying on designated routes, taking all litter home, and being considerate of other users and wildlife. The area is known for its unique landscape, including drystone walls, and is a haven for nature lovers.
The route passes through rural areas, but Trefor itself offers some basic amenities. For more options, you might consider nearby villages or towns on the Llŷn Peninsula. It's always advisable to carry sufficient water and snacks, as refreshment stops may be infrequent, especially outside of peak season.
The Bwlch Mawr loop is estimated to take approximately 2 hours and 20 minutes to complete for an average touring cyclist. This duration can vary based on your fitness level, the number of stops you make to enjoy the views, and weather conditions.