Routes up
Mynydd Mawr routes: 3 ways to the top
From Rhyd DduHiking · 5.0 km one way · 523 m ascent · ~1h 50m · from Rhyd Ddu car parkModerate
Head through the forestry north-west of the village onto the east ridge, then follow grass and stones to the summit.
Near the start
From OpenStreetMap, within 2 km. Check opening times before you rely on them.
Full From Rhyd Ddu route guideWestern ascent from FronHiking · 3.8 km one way · 420 m ascent · ~1h 30m · from Fron public upland pathHard
Rhyd Ddu via Foel RûddHiking · 3.9 km one way · 490 m ascent · ~1h 35m · from Rhyd Ddu forest pathHard
Summit today
Is it safe to climb Mynydd Mawr today?
Loading the summit forecast…
Cloud inversion · 7 days
The chance of standing above a sea of cloud on Mynydd Mawr each morning this week, from overnight temperature, humidity and low cloud below the 698m summit.
Dark sky · 7 days
How dark the sky gets over Mynydd Mawr each night this week, from cloud cover, moonlight and local light pollution.
Snow · 7 days
No snow is forecast at the summit in the next 7 days.
Sun today
Sunrise 07:07, sunset 16:53
9h 47m of daylight. Golden hour ends 07:57 and starts 16:02. From the summit you see the sun 07:01 to 16:58.
Nearby summits
Close to Mynydd Mawr
About Mynydd Mawr
Mynydd Mawr stands on its own at the head of the Nantlle valley, with Llyn Cwellyn below its eastern slopes and Rhyd Ddu nearby. From the north-west the hill looks like a resting elephant, and locals call it that. On the south side the long cliffs of Craig y Bera fall towards Drws-y-Coed. Across that valley the Nantlle Ridge runs west, with Y Garn 2.4 km south-east and Trum y Ddysgl, the nearest higher hill, 3.1 km south.
The usual way up starts near Llyn Cwellyn and climbs through forestry to the open east ridge, then over grass and stones to the top. The path above Craig y Bera follows the cliff edge, so keep to it in cloud.
The summit gives a close view of Yr Wyddfa (Snowdon) across the Cwellyn valley.
Mynydd Mawr is 698 m (2,290 ft) high with 463 m of prominence. It is in Snowdonia, Wales. It is the 65th highest of the 152 summits Peakify lists in Snowdonia. The nearest summits are Foel Rûdd (0.9 km), Y Garn (2.4 km) and Trum y Ddysgl (3.1 km).
Why is Mynydd Mawr called the elephant?
From the north-west its shape looks like a resting elephant, with the east ridge as the trunk.
Where do you start Mynydd Mawr?
Most walkers start near Llyn Cwellyn or Rhyd Ddu and climb the eastern slopes.
Is Mynydd Mawr suitable for beginners?
Yes, in good weather. The path is clear, but keep back from the Craig y Bera cliffs on the south side.
How high is Mynydd Mawr?
Mynydd Mawr is 698 metres high with 463 metres of prominence.
Where is Mynydd Mawr?
Mynydd Mawr is listed in Snowdonia, Wales.
Are there routes for Mynydd Mawr?
Peakify lists 3 routes for Mynydd Mawr, including available distance, ascent, start point, and difficulty details. The easiest is From Rhyd Ddu (5.0 km one way, Moderate).
Is it safe to climb Mynydd Mawr today?
Peakify rates each day on the summit Good, Marginal or Poor from the forecast summit wind, gusts, chance of rain and wind chill. Wind of 40 mph or gusts of 65 mph make it Poor; wind of 25 mph, gusts of 45 mph, a 60% chance of rain or a feels-like temperature of -8°C or below make it Marginal. Today's and tomorrow's ratings are at the top of this page. The rating covers the weather only: also check your route, daylight, kit and experience, and in winter whether you need an ice axe and crampons.
What weather information is shown for Mynydd Mawr?
The page includes cached mountain forecast context, snow outlook, dark-sky signals, cloud-inversion information, sunrise, sunset, and summit planning details where available.
Peakify is run by Sam Tyler, who has climbed Yr Wyddfa 22 times. The forecast refreshes every hour; how our forecast works.
