Eryri National Park, Gwynedd, Wales
Snowdon's summit is in cloud for roughly 300 days a year. The difference between a transcendent day and a dangerous scramble in near-zero visibility can be just a few hours. RambleMetric puts that data in your hands.
About Snowdonia
RambleMetric is a real-time conditions app built for inland walkers. It combines live weather, summit visibility, wind and path conditions into a single Visit Score — so you can see at a glance whether today is a good day to tackle Snowdon and the peaks of Eryri.
Snowdon (Yr Wyddfa) at 1,085 m is the highest peak in Wales and England. Summit conditions are dramatically different from Llanberis valley. Weather changes within the hour. Data shown is gathered from third-party sources and may not reflect current conditions at altitude.
Walking Routes
Check the live Visit Score before you set out — conditions here change fast.
Pen-y-Pass car park to Snowdon summit via the Pyg Track — dramatic views of Glaslyn and Crib Goch throughout. Rocky and exposed above the Bwlch. Return via Miners' Track for a circular route.
Broad track via three mountain lakes — the most accessible Snowdon route. Still a serious mountain walk with a steep final kilometre. Ice makes the upper section hazardous — check conditions.
Key Features
1,085 m — highest peak in Wales and England. The Hafod Eryri summit building has a café and interpretive displays. Views extend to Ireland on exceptionally clear days.
The Dragon's Back — a 921 m arete scramble forming part of the Snowdon Horseshoe. Grade 1 rock scramble: exposed, airy and lethal in wind or ice. One of the most memorable ridges in Britain.
The Copper Lake — iron-rich minerals give it a deep copper-green colour. At 600 m it sits in the corrie directly below the summit crags. Associated with Arthurian legend.
The only public rack-and-pinion mountain railway in Britain — runs from Llanberis to the summit in 60 minutes. Does not operate in severe wind or during winter closures.
Live Data
All data is fetched from authoritative UK sources and recalculated every few minutes.
Safety Information
Always carry a map, compass and full mountain gear — summit temperatures are 10–15°C lower than Llanberis. Crib Goch is a serious grade 1 scramble and is lethal in wind, ice or poor visibility. The Pyg and Miners' Tracks are the safest routes in poor conditions. The Snowdon Mountain Railway does not operate in severe weather. Register your route.
All data, scores and recommendations are for general informational purposes only and should not be relied upon as the sole basis for safety decisions. The Visit Score is an algorithmic estimate — it is not a substitute for your own judgement, local knowledge, or official guidance.
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