Llŷn Peninsula Coastal Loop
Llŷn Peninsula Coastal Loop
4
riders
03:52
60.4km
710m
Cycling
Cycle the difficult 37.6-mile Mynydd Mawr & Hell's Mouth beach route from Nefyn, featuring tough climbs and stunning Llŷn Peninsula coastal
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
3.18 km
Highlight • Beach
Tip by
28.7 km
Highlight • Natural Monument
Tip by
33.4 km
Highlight • Settlement
Tip by
41.2 km
Highlight • Beach
Tip by
59.8 km
Highlight • Viewpoint
Tip by
60.4 km
End point
Parking
Way Types & Surfaces
Way Types
54.4 km
3.69 km
1.64 km
771 m
Surfaces
50.1 km
8.19 km
2.19 km
< 100 m
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Elevation
Highest point (190 m)
Lowest point (10 m)
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Weather
Powered by Foreca
Thursday 7 May
16°C
7°C
16 %
Additional weather tips
Max wind speed: 15.0 km/h
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This route was planned by komoot.
This route is categorized as a difficult touring bicycle ride, requiring a very good level of fitness. It covers approximately 60.4 kilometers with an elevation gain of 713 meters. Expect significant climbs, particularly the tough ascent to Rhiw from Hell's Mouth Beach, which has an average gradient of 7% and a steepest segment of 19.1%.
Due to the significant climbs, especially the ascent to Rhiw, mountain gearing is highly recommended. Some segments are so steep that you might even need to push your bike.
The route offers stunning coastal scenery and passes several notable highlights. You'll experience the beautiful Porthdinllaen Bay, the prominent Mynydd Mawr, and the picturesque Hell's Mouth Beach (Porth Neigwl) with its fantastic views. The starting point, Nefyn Beach, is also a charming spot.
While specific parking details are not provided, Nefyn is a seaside village, and parking options are typically available near the beach or in designated village car parks. It's advisable to check local signage upon arrival for the most current information.
While the Llŷn Peninsula generally welcomes dogs, specific rules can vary for cycling routes and beaches. It's always best to keep dogs on a lead, especially in rural areas with livestock, and to check local regulations for any restrictions on beaches or specific sections of the trail.
The Llŷn Peninsula offers beautiful scenery year-round, but for touring cycling, the spring and summer months (April to September) generally provide the most favorable weather conditions. This allows for better enjoyment of the coastal views and avoids the harsher winds and rain that can occur in autumn and winter.
Generally, there are no specific permits or entrance fees required for cycling on public rights of way within the Llŷn National Landscape. However, always respect private land, follow the Countryside Code, and be aware that some specific attractions or car parks may have charges.
Yes, starting in Nefyn, you'll find amenities. The route also passes through or near charming villages like Aberdaron, which offer options for cafes and pubs. Hell's Mouth Beach itself might have seasonal facilities, but it's always wise to carry snacks and water, especially on a challenging route like this.
Yes, sections of this touring bicycle route overlap with other well-known paths. Approximately 13% of the route follows parts of the Llŷn Coastal Path, and smaller segments also intersect with the Porth Meudwy Coastal Walk, Llyn, and the Plas yn Rhiw and Rhiw Village Walk, Llyn.
The route is mostly paved, offering a good surface for touring bicycles. However, don't let the 'mostly paved' description fool you; the significant elevation changes mean you'll encounter challenging ascents and descents, particularly around Mynydd Mawr and the Rhiw area.
The estimated duration for this touring bicycle route is approximately 3 hours and 52 minutes. This is an estimate for continuous cycling and does not include stops for breaks, sightseeing, or navigating challenging sections.