Snowdonia National Park, Wales
By The Alpines · Updated 2025-03-10 · 9 min read
The Watkin Path is the longest and steepest of the main routes up Snowdon. It climbs more height than any other path on the mountain — over 1000m from the valley floor to the summit — and packs in more variety than most: woodland, industrial history, a glacial cwm, loose scree, and a final scramble along an exposed ridge.
The path starts from Pont Bethania in the Nant Gwynant valley, one of the most beautiful valleys in Snowdonia. It follows an old tramway through oak woodland before reaching Gladstone Rock, where William Gladstone — then 83 years old and still Prime Minister — officially opened the path in 1892. Above the rock, the route passes through the remains of the South Snowdon slate quarry, a reminder that these mountains were once industrial workplaces.
Beyond the quarry workings, the path enters Cwm Tregalan and the character changes completely. The ground steepens dramatically, the path becomes loose scree and rock, and the final section up the south ridge involves Grade 1 scrambling on exposed terrain. You join the other summit paths only in the last few hundred metres. It's quieter than the Llanberis, Pyg, and Miners' paths, and feels wilder for it.
The path starts from the car park at Pont Bethania and follows a broad track through oak woodland along the line of an old quarry tramway. The gradient is gentle and the walking easy. Gladstone Rock — a large boulder where the path was officially opened in 1892 — marks the end of the easy section. A good place to stop and take in the valley views behind you.
Above Gladstone Rock, the path passes through the ruins of the South Snowdon slate quarry. Old workings, inclines, and ruined buildings line the route. The terrain steepens and the path becomes rougher. Views open up across Nant Gwynant to the Moelwynion range. The cwm ahead begins to reveal itself — a wide, rocky bowl beneath the south ridge.
This is the crux of the route. The path climbs steeply through loose scree and broken rock up the headwall of Cwm Tregalan. The ground is unstable in places and requires careful foot placement. In wet conditions, this section is particularly demanding. The gradient is relentless — this is where the Watkin Path earns its reputation as the toughest standard Snowdon route.
The final section follows the narrow south ridge (Bwlch Main) to the summit. This is exposed, with steep drops on both sides, and involves Grade 1 scrambling on rock. In wind or poor visibility, this section demands respect. Near the top, you join the Rhyd Ddu path and then the other summit paths for the final steps to the cairn and the Hafod Eryri summit building.
The Watkin Path is best between May and October. The upper scree section and south ridge scramble are significantly harder in winter conditions — snow and ice turn the exposed ridge into a serious mountaineering route requiring crampons and an ice axe. This is not a winter walking route unless you have winter mountaineering experience.
Summer weekends are busier but still quieter than the northern paths. Early starts (before 8am) give you the best chance of parking at Pont Bethania and a quieter mountain. Autumn is excellent — cooler temperatures make the steep ascent more comfortable, and the valley woodland turns gold.
Avoid this route in poor visibility if you're not confident with navigation. The upper section is pathless in places and the south ridge requires you to stay on the crest — straying off-line leads to dangerous ground.
The Watkin Path has the most elevation gain of any standard Snowdon route — over 1000m in around 6.5km. The lower half is straightforward, but the upper half is steep, loose, and exposed. The final ridge scramble is Grade 1 and requires a head for heights. This is a demanding mountain day that rewards fitness and experience.
Over 1000m of ascent, with the steepest sections on loose scree in the upper cwm
The south ridge (Bwlch Main) involves scrambling on exposed rock with steep drops on both sides
The scree section above Cwm Tregalan requires careful foot placement and is tiring on the descent
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Last updated: 2025-03-10 · 9 min read