4.6
(29)
1,854
riders
48
rides
Road cycling around Llyn Idwal offers diverse routes within the dramatic landscape of Snowdonia National Park. The region is characterized by ice-sculpted glacial valleys, such as Cwm Idwal, and mountainous terrain that provides both challenging ascents and scenic roads. Road cyclists can expect varied elevation gains across routes, with some paths leading through significant passes and offering views of the area's unique geological formations. The surrounding network supports a range of cycling experiences, from moderate loops to difficult, longer rides.
…Last updated: June 24, 2026
12
riders
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
11
riders
78.2km
03:54
1,020m
1,020m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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89
riders
19.6km
01:04
390m
390m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
19
riders
11.1km
00:33
100m
100m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
10
riders
10.3km
00:40
250m
250m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
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fairly steady climb and then a great descent down. The roads can be very busy during peak season and holidays.
1
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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)
7
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Loved this place and not far from Swallow Falls
1
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If you want to park here, you have to reserve a parking space in advance for 20 GBP. We didn't manage to do it, as everything was fully booked. You can then park in Llanberies and take the Sherpa Bus S1 or S2 to Pen y Pass. The bus runs every half hour. From Pen y Pass, you can then choose the Miner's Track or Pyg Track. Have fun!
2
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Right opposite the layby are the two main blocks - a good description and link to the topo is at https://www.climber.co.uk/outdoor/bouldering/around-the-bloc-the-cromlech-boulders-llanberis/ There are more higher up on the hill and you will find boulderars here at most times of the weather permits.
3
0
Currently parking is pre-booking only! All others are directed to the P+R in the village and need to get up by bus or walk.
3
0
There are over 50 road cycling routes available in the Llyn Idwal area, catering to various skill levels and preferences. These routes explore the dramatic landscapes of Snowdonia National Park.
The routes around Llyn Idwal offer a range of difficulties. You'll find approximately 13 easy routes, 28 moderate routes, and 9 difficult routes, ensuring options for all experience levels from casual rides to challenging climbs.
Yes, there are several easy routes suitable for beginners. For example, the Llanberis Lake Railway – Llanberis Pass loop from Tryfan is a shorter, less strenuous option, covering about 9.7 km with minimal elevation gain.
For experienced cyclists seeking a challenge, the region offers routes with substantial elevation. The Llyn Dinas – Caernarfon Castle loop from Pen-y-Pass is a difficult 78 km path with over 1000 meters of elevation gain, providing a demanding ride through scenic terrain.
Road cycling routes in this area showcase the stunning glacial valleys and mountainous terrain of Snowdonia. You'll encounter dramatic landscapes like Cwm Idwal, pristine lakes such as Llyn Ogwen, and impressive rock formations. The region is known for its 'show-stopping scenery' and unique geology.
Many routes pass by significant landmarks. For instance, the challenging Llyn Dinas – Caernarfon Castle loop from Pen-y-Pass takes you past historic Caernarfon Castle. Other routes offer views of Llyn Ogwen and traverse the scenic Llanberis Pass, providing glimpses of the area's natural and historical beauty.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 25 reviews. Cyclists frequently praise the diverse terrain, from challenging climbs to scenic, traffic-light roads, and the dramatic natural beauty of the Snowdonia National Park.
Yes, many road cycling routes around Llyn Idwal are designed as loops, allowing you to start and finish at the same point. Examples include the popular Betws-y-Coed Village – Llyn Ogwen loop from Tryfan and the Llanberis Pass – Pen-y-Pass loop from Cwm Dyli Power Station.
Llyn Idwal itself is primarily a hiking destination within a National Nature Reserve, with walking paths encircling the lake. While the immediate area around the lake is not for road cycling, its proximity to the broader Snowdonia road cycling network makes it an excellent base for exploring the region's challenging and scenic roads.
The Snowdonia region offers beautiful cycling conditions, but weather can be unpredictable. Spring and autumn generally provide cooler temperatures and vibrant scenery, while summer offers longer daylight hours. Always check the local weather forecast before heading out, as conditions can change rapidly in mountainous areas.
While Llyn Idwal's immediate surroundings are rugged, the wider Snowdonia region offers a variety of cycling routes for all skill levels, including some traffic-free paths suitable for families. For more information on family-friendly options, you might find resources on the Visit Snowdonia website.
Parking is typically available at common starting points for routes in the Snowdonia National Park. Specific parking information can often be found in the route descriptions on komoot or local visitor information centers. Always check for designated parking areas and any associated fees.
Yes, many routes in the Llyn Idwal area and wider Snowdonia region pass through or near villages and towns where you can find cafes, pubs, and other amenities. For example, the Pen-y-Pass – Mallory's Café loop from Tryfan specifically mentions a cafe along its path, providing a convenient stop for cyclists.


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