4.8
(76)
8,532
runners
164
runs
Jogging around Llyn Llydaw offers a variety of routes within the mountainous landscape of Eryri (Snowdonia). The region is characterized by its prominent peaks, including Yr Wyddfa (Snowdon), and the glacial lake itself, Llyn Llydaw. Running trails often feature significant elevation changes, rugged terrain, and panoramic views of the surrounding valleys and water bodies.
Last updated: June 24, 2026
5.0
(4)
473
runners
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
5.0
(1)
128
runners
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(1)
207
runners
21.3km
03:17
970m
970m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
28
runners
28.3km
05:03
1,750m
1,750m
Hard run. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
13
runners
9.71km
01:11
310m
310m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Crib Goch is a super “exciting” Grade 1 scramble, but it is important to know your abilities and manage the risks of traversing this amazing ridge. Crib Goch is one of the best ridges of its kind and grade anywhere in the UK. It has great scrambling, with some famous arete sections. On a grade one scramble you will need to use your hands on the rock, and on Crib Goch you will do this often. Traversing the ridge on a sunny day is a marvellous experience; on a cold winter day, or in bad weather, it can be perilous without the appropriate equipment. While often straightforward, Grade 1 scrambles still carry risk due to height and exposure, and they should not be taken for granted, especially in poor weather.
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The Llanberis Path is considered the easiest path for climbing Yr Wyddfa (Snowdon), and it's particularly popular for first-timers. It has a very short steep climb in the beginning don't be put off by this, it then has a long, gradual ascent up to the summit, just over 9 miles up and down.
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A wonderful spiky summit with fine views to Yr Wyddfa and into Ogwen Valley. The summit itself is a scramble over very large jumbled boulders.
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A meeting of the ways as well as the col between Tryfan and Glyder Fach
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The high pass between Tryfan and Glyder Fach is also a crossroads for a number of paths - down to the Ogwen valley, but also up to Tryfan and to Glyder Fach via the Bristly Ridge or the bypass route.
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There are over 170 running routes available in the Llyn Llydaw area, catering to various skill levels. While the majority are challenging, you can find a few easier options for a more relaxed run.
Yes, while the region is known for its challenging mountain trails, there are a few easier running options. These routes typically feature less elevation gain and more stable terrain, making them suitable for beginners or families looking for a less strenuous experience.
Running routes around Llyn Llydaw vary significantly. You can find trails ranging from approximately 9.7 km (6 miles) to over 28 km (17 miles). Durations can range from just over an hour to several hours, depending on the route's length and difficulty, as well as your pace.
Many popular running routes, including those leading up Yr Wyddfa (Snowdon), often start from Pen-y-Pass. This location provides access to several well-known trails like the Pyg and Miners Tracks. Consider routes such as Pyg and Miners Track loop on Yr Wyddfa (Snowdon) from Pen-y-Pass.
Yes, Pen-y-Pass is a primary starting point for many routes and offers parking facilities. However, it's a very popular location, especially during peak season, so arriving early is advisable to secure a spot. Other trailheads may have limited parking.
The terrain around Llyn Llydaw is predominantly rugged and mountainous. Expect a mix of rocky paths, uneven ground, and significant elevation changes. Some trails follow historical mining paths, while others traverse high ridges, offering a true trail running experience.
Yes, several excellent circular routes are available. For example, the Yr Wyddfa (Snowdon) Horseshoe loop from Pen-y-Pass is a challenging but rewarding circular trail that offers expansive views. Another option is the Mallory's Café – Pen-y-Pass loop from Pen-y-Pass.
The routes offer stunning natural beauty and historical sites. You'll encounter the glacial lake itself, Llyn Llydaw, and the fascinating Ruins of the Britannia Copper Mine at Llyn Llydaw. Many trails also provide panoramic views of Yr Wyddfa (Snowdon) and the surrounding Snowdonia National Park.
The running routes in Llyn Llydaw are highly regarded by the komoot community, with an average rating of 4.8 stars from over 70 reviews. Runners frequently praise the dramatic lake views, the challenging mountain trails, and the rugged, yet rewarding, paths.
Winter running in Llyn Llydaw can be very challenging due to harsh weather conditions, including snow, ice, and strong winds, especially at higher elevations. It's recommended only for experienced runners with appropriate gear and knowledge of mountain safety. Always check the weather forecast and trail conditions before heading out.
Dogs are generally welcome on trails in Snowdonia National Park, including those around Llyn Llydaw. However, it's crucial to keep them on a lead, especially near livestock or ground-nesting birds, and to follow the Countryside Code. Be mindful that some terrain can be challenging for pets.
The best time for running in Llyn Llydaw is typically from late spring to early autumn (May to October). During these months, the weather is generally milder, days are longer, and trail conditions are more favorable. However, mountain weather can be unpredictable, so always be prepared for changes.


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