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Road cycling routes
United Kingdom
Wales
North Wales
Gwynedd

Llanberis

The best road cycling routes around Llanberis

4.6

(73)

4,362

riders

21

rides

Road cycling routes around Llanberis are set within the dramatic landscapes of Snowdonia National Park, North Wales. The region is characterized by challenging mountain passes like Llanberis Pass, the imposing presence of Mount Snowdon, and glacial lakes such as Llyn Padarn and Llyn Peris. Cyclists encounter a mix of demanding ascents and scenic loops, often passing historic slate quarries and offering views across the national park.

Best road cycling routes around Llanberis

  • The most popular road cycling route is Pen y Pass and Marchlyn Mawr climb loop from Llanberis, a 34.0 miles (54.6 km) trail that takes 2 hours 56 minutes to complete. This difficult route features two challenging climbs and panoramic views across the national park.
  • Another top favourite among local road cyclists is Cromlech Boulders – Mallory's Café loop from Llanberis, a moderate 19.0 miles (30.6 km) path. This route offers scenic loops with views of the surrounding mountains and valleys.
  • Local road cyclists also love the Caernarfon Castle – View of Llyn Peris loop from Llanberis, a 32.0 miles (51.5 km) trail leading through historic Caernarfon and past Llyn Peris, often completed in about 2 hours 19 minutes.
  • Road cycling around Llanberis is defined by challenging mountain passes, glacial lakes, and historic slate quarries. The network offers options for different ability levels, from moderate rides to routes with significant elevation gains.
  • The routes in Llanberis are highly rated by the komoot community with an average score of 4.9 stars from over 5 reviews. More than 590 road cyclists have used komoot to explore Llanberis's varied terrain.

Last updated: July 7, 2026

4.8

(4)

213

riders

#1.

Pen y Pass and Marchlyn Mawr climb loop from Llanberis

54.6km

02:57

1,000m

1,000m

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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Hard

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

Moderate
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Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.

Moderate

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

Moderate

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

Moderate
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Tips from the Community

Clive G
March 25, 2026, Llyn Ogwen

Beautiful lake, but avoid the area at Easter!

0

0

Beautiful view

Translated by Google

5

0

Strange building

Translated by Google

5

0

Loved this place and not far from Swallow Falls

1

0

Juliane
June 24, 2025, Pen-y-Pass

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!

Translated by Google

2

0

Bumble-Bee
June 23, 2025, Pen-y-Pass

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

Great few hours spent. Fairly easy hike.

0

0

A great place to watch the sunset

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0

Frequently Asked Questions

How many road cycling routes are available around Llanberis?

Llanberis offers a diverse selection of over 20 road cycling routes. These routes cater to various skill levels, including 8 easy, 10 moderate, and 5 difficult options, all set within the stunning Snowdonia National Park.

What kind of terrain can I expect on road cycling routes in Llanberis?

Road cycling in Llanberis features a mix of challenging mountain passes, such as the Llanberis Pass, and scenic loops around glacial lakes like Llyn Padarn and Llyn Peris. You'll encounter demanding ascents, fast descents, and routes that often pass historic slate quarries, offering panoramic views across the national park.

Are there any challenging climbs for experienced road cyclists in the Llanberis area?

Yes, Llanberis is known for its challenging climbs. For instance, the Pen y Pass and Marchlyn Mawr climb loop from Llanberis features two significant ascents and over 1000 meters of elevation gain, providing a demanding ride with spectacular views.

What natural features or landmarks can I see while road cycling near Llanberis?

Many routes offer views of iconic natural features and historical landmarks. You can expect to see Mount Snowdon, glacial lakes such as Llyn Padarn and Llyn Peris, and the dramatic Llanberis Pass. Historical sites like Dolbadarn Castle and the impressive slate quarries, including the Dinorwig Quarry, are also prominent. Highlights like Llanberis Village and Llyn Padarn, or the stunning Cwm Idwal are often part of the scenic backdrop.

Are there any moderate road cycling routes suitable for those looking for a scenic but less strenuous ride?

Absolutely. A popular moderate option is the Cromlech Boulders – Mallory's Café loop from Llanberis, which offers scenic views of the surrounding mountains and valleys over approximately 30 kilometers. Another great choice is the Caernarfon Castle – View of Llyn Peris loop from Llanberis, which takes you through historic Caernarfon.

What do other cyclists say about road cycling in Llanberis?

The road cycling routes in Llanberis are highly rated by the komoot community, with an average score of 4.9 stars from over 5 reviews. Cyclists frequently praise the region's dramatic landscapes, challenging climbs, and the stunning views across Snowdonia National Park.

Are there any circular road cycling routes starting from Llanberis?

Yes, many road cycling routes around Llanberis are designed as loops, allowing you to start and finish in the same location. Examples include the Pen y Pass and Marchlyn Mawr climb loop and the Pen-y-Pass – Nant Peris Valley loop, both offering comprehensive tours of the area's highlights.

What is the best season for road cycling in Llanberis?

While road cycling is possible year-round, the best seasons are generally spring, summer, and early autumn. During these times, you'll experience more favorable weather conditions, longer daylight hours, and the full beauty of Snowdonia's landscapes. Winter can bring challenging conditions, including colder temperatures and potential ice or snow on higher passes.

Are there family-friendly cycling options near Llanberis?

While many road cycling routes in Llanberis feature significant climbs, there are options for families looking for easier rides. The region offers flatter sections, particularly towards the coastal town of Caernarfon. For dedicated family-friendly cycling paths, you might find more suitable options on routes specifically designed for leisure cycling, such as those mentioned on Visit Snowdonia's family cycling page.

Where can I find parking for cyclists in Llanberis?

Llanberis village offers various parking facilities. Additionally, some routes might pass by or start near specific parking areas. For example, the Ogwen Visitor Centre and Snack Bar, though a bit further afield, is a known parking spot for outdoor enthusiasts in the wider Snowdonia area.

Can I access road cycling routes in Llanberis using public transport?

Llanberis is accessible by public transport, with bus services connecting it to larger towns. This allows cyclists to reach the starting points of many routes without a car. It's advisable to check local bus schedules and any restrictions for carrying bicycles before planning your trip.

Are there any cafes or pubs along the road cycling routes in Llanberis?

Llanberis village itself has cafes and restaurants for refreshments before or after your ride. Many routes are designed to pass through or near villages and towns where you can find places to stop. For example, the Cromlech Boulders – Mallory's Café loop specifically mentions Mallory's Café, indicating a potential stop along that route.

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