Highlight • Lake
Hiking
5.0
(3)
Mountain biking
5.0
(1)
Llyn Melynllyn, Welsh for 'yellow lake', is a captivating glacial lake nestled high within the rugged Carneddau mountain range in Snowdonia, North Wales. Situated in Conwy at an elevation of approximately 610 meters (2,000 feet), this pristine body of water is renowned for its dramatic setting. Cliffs rise steeply from its western edge, leading up towards the summit of Foel Grach, with numerous feeder streams cascading down these crags into the lake.
Visitors are consistently drawn to Llyn Melynllyn for…
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Nearby routes
Best routes near Yellow Lake

4.7
(14)
105
hikers
9.51km
02:51
300m
300m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

5.0
(1)
55
hikers
9.32km
02:54
360m
360m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

5.0
(1)
37
hikers
10.0km
03:09
390m
390m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
Details
Informations
Elevation 690 m
Weather
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Thursday 14 May
10°C
3°C
31 %
Additional weather tips
Max wind speed: 19.0 km/h
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The terrain around Llyn Melynllyn is characteristic of the Carneddau mountains, featuring rugged, rocky paths with significant elevation changes. Hikers can expect a mix of grassy slopes, scree, and potentially boggy sections, especially after rain. Sturdy, waterproof footwear with good ankle support is highly recommended due to the uneven and sometimes challenging ground.
Yes, beyond the natural beauty of the lake itself, visitors can discover remnants of its industrial past. Look for an old quarry building with a large cast-iron flywheel, partially buried, which is a testament to the area's history as a source for honing stones in Victorian Britain. The dramatic cliffs rising to Foel Grach also serve as a prominent natural landmark.
Llyn Melynllyn is less than a kilometer south of the larger Llyn Dulyn. While both are stunning mountain lakes in the Carneddau, Llyn Melynllyn is often described as having a more 'yellow' or 'golden' hue, especially in certain light, and is known for its historical quarrying connections. Llyn Dulyn, on the other hand, is generally deeper, darker, and has a more haunting reputation, partly due to its deep cliffs and history of plane crashes. Visiting both offers a diverse experience of the region's glacial lakes.
Llyn Melynllyn is generally considered to offer moderate to difficult walking routes. The trails involve gradual ascents and can be challenging, particularly in wet conditions. While rewarding, it may not be ideal for absolute beginners or very young children due to the rugged terrain and elevation. Families with older, experienced children who are accustomed to mountain hiking might find it suitable.
The remote Carneddau range is home to diverse wildlife. Hikers and birdwatchers may spot various bird species, including raptors soaring above the cliffs. The area is also known for its wild Carneddau ponies, which roam freely. Keep an eye out for other mountain fauna, though they can be elusive in this wild landscape.
While Llyn Melynllyn's clear waters can be inviting, wild swimming is undertaken at your own risk. The lake is high in the mountains, meaning the water is typically very cold, even in summer. There are varying depths and an irregular shoreline. Always prioritize safety, be aware of weather conditions, and consider local advice before entering the water.
Given the mountain environment and potentially changeable weather, it's crucial to dress in layers. Essential gear includes sturdy, waterproof hiking boots, waterproof outer layers (jacket and trousers), and warm clothing even in summer. A hat, gloves, and sun protection are also advisable. Always check the local weather forecast before setting out.
Llyn Melynllyn is located in a remote part of the Carneddau mountains, within Snowdonia National Park. As such, there are no direct amenities like cafes, pubs, or accommodation immediately at the lake. Visitors should plan to be self-sufficient with food and drink. The nearest facilities would be found in the surrounding villages or towns, requiring a drive from the trailheads.
Access to Llyn Melynllyn typically involves parking at designated spots or lay-bys along roads leading into the Carneddau, such as those near Tal-y-Bont or the A5. Parking can be limited, especially during peak seasons. It's advisable to arrive early to secure a spot and to park responsibly, ensuring no obstructions to local traffic or access points.
Due to its remote mountain location, direct public transport to Llyn Melynllyn is very limited or non-existent. Access usually requires a car to reach the nearest trailheads. Some bus services may operate to villages in the wider Snowdonia area, but a significant walk or further transport would be needed to reach the lake itself.
Llyn Melynllyn sits at a significant elevation of just over 2,000 feet (610 meters) above sea level. This high altitude contributes to its wild, remote feel and the challenging nature of the surrounding trails.