4.5
(29)
2,277
riders
61
rides
Road cycling routes around Llyn Cwellyn are set within Snowdonia National Park, characterized by a large glacial moraine lake nestled between the Snowdon Massif and Mynydd Mawr. The terrain features rugged mountain scenery, forested valleys, and a mix of lakeside roads and challenging ascents. The A4085 road runs directly past Llyn Cwellyn, forming part of several cycling routes. This region offers varied road cycling terrain, from moderate paths to difficult climbs.
Last updated: April 26, 2026
29
riders
63.2km
02:48
630m
630m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
27
riders
76.4km
03:59
1,180m
1,180m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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8
riders
36.2km
01:50
520m
520m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
11
riders
47.7km
02:15
460m
460m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
10
riders
24.6km
01:06
250m
250m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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The bridge was probably built in the 17th century and then radically rebuilt and widened in 1795-1796. As with many older bridges, folk tales claimed that the bridge was built by the devil or by the Romans (which an investigation by the National Trust described as "very doubtful"). During the reconstruction, a stone was found with the inscription "W M 1656" scratched on it, suggesting that the bridge is at least that old. Pont Aberglaslyn is located near the downstream end of the Aberglaslyn Pass. Although the location is rocky and the river flows through rapids upstream, it is not far above sea level. (Wikipedia)
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Beddgelert is a lovely village below Moel Hebog, and the bridge over the river is a key feature.
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I think the start and the end is probably the hardest but overall pretty easy path you can’t get lost
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A wide selection of waterproof and windproof clothing, technical gear, footwear, rucksacks, camping essentials, navigation tools, and outdoor accessories . Dog-friendly gear: collars, leads, harnesses, booties, and packs. Expert staff — outdoor enthusiasts (many fluent in Welsh) ready to provide tailored advice in-store, by phone, or online .
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When in Beddgelert make sure to stop at Glaslyn cafe.
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There are over 60 road cycling routes around Llyn Cwellyn, offering a wide range of options for different skill levels. This includes 19 easy routes, 35 moderate routes, and 9 difficult routes.
The terrain around Llyn Cwellyn is diverse, characterized by rugged mountain scenery, forested valleys, and the picturesque glacial lake itself. You'll find a mix of well-paved lakeside roads and challenging ascents into the mountains, with routes offering varied elevation gains.
Yes, there are 19 easy road cycling routes around Llyn Cwellyn. An example is the Llyn Cwellyn – Beddgelert Stone Bridge loop from Waunfawr, which is 24.6 km with moderate elevation gain, offering a good introduction to the area's beauty.
For experienced cyclists seeking a challenge, there are 9 difficult routes. A notable option is the Caernarfon Castle – Pont Aberglaslyn loop from Rhyd-ddu, a 76.4 km path featuring significant elevation gain and stunning mountain vistas.
Yes, many of the road cycling routes around Llyn Cwellyn are circular, allowing you to start and end at the same point. Routes like the Harlech Castle – Pont Aberglaslyn loop from Snowdon Ranger offer a comprehensive tour of the region's landscapes.
Road cycling routes around Llyn Cwellyn offer views of the majestic Snowdon Massif and Mynydd Mawr. You can also spot the unique natural rock formation of Castell Cidwm at the northern end of the lake. The area is rich in wildlife, with otters and rare Arctic char in the lake.
While the region features mountainous terrain, there are easier routes that can be suitable for families, particularly those with some cycling experience. Look for routes categorized as 'easy' or 'moderate' which tend to have less demanding climbs and more gentle gradients.
The best time to road cycle around Llyn Cwellyn is generally during the warmer, drier months from late spring to early autumn (May to September). This period offers more predictable weather, longer daylight hours, and better road conditions, though the region's weather can be changeable.
Parking is available at various points around Llyn Cwellyn, particularly near popular starting points for routes such as Snowdon Ranger and Rhyd-ddu. These locations often serve as trailheads for both cycling and hiking, providing convenient access to the routes.
Yes, many routes pass through or near villages like Beddgelert, Llanberis, and Betws Garmon, where you can find cafes, pubs, and other amenities to refuel during your ride. The A4085 road, which runs past Llyn Cwellyn, connects to several of these points.
The road cycling routes around Llyn Cwellyn are highly rated by the komoot community, with an average score of 4.5 stars from over 28 reviews. Cyclists often praise the dramatic glacial landscapes, stunning mountain views, and the variety of routes available for different abilities.
Absolutely. Several routes incorporate views of historic castles. For instance, the Harlech Castle – Pont Aberglaslyn loop from Snowdon Ranger offers glimpses of historic castles, while the Caernarfon Castle – Caernarfon Castle loop from Waunfawr provides views of the iconic Caernarfon Castle.
Yes, the Welsh Highland Railway runs along Llyn Cwellyn, offering scenic views for passengers and adding an iconic visual element to the landscape. You can enjoy watching the heritage trains pass by as you cycle along routes that parallel the railway line.


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