Routes up
Gyrn Ddu routes: 4 ways to the top
South Ridge RouteHiking · 5km · 400 m ascent · ~1h 40m · from PenygroesModerate
This route ascends the south ridge of Gyrn Ddu, offering panoramic views of the surrounding landscape.
Northwest ApproachHiking · 4km · 380 m ascent · ~1h 25m · from LlanllyfniModerate
The Northwest Approach provides a scenic hike with a gradual ascent, suitable for most hikers.
East Face ScrambleScrambling · 3km · 350 m ascent · ~1h 10m · from Clynnog FawrGrade 1 Scramble
The East Face Scramble is a challenging route that requires careful navigation and offers a thrilling ascent.
West Ridge ClimbScrambling · 2.5km · 420 m ascent · ~1h 10m · from TreforGrade 2 Scramble
The West Ridge Climb is a more technical route, involving some exposure and requiring good scrambling skills.
Summit today
Is it safe to climb Gyrn Ddu today?
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Cloud inversion · 7 days
The chance of standing above a sea of cloud on Gyrn Ddu each morning this week, from overnight temperature, humidity and low cloud below the 522m summit.
Dark sky · 7 days
How dark the sky gets over Gyrn Ddu each night this week, from cloud cover, moonlight and local light pollution.
Snow · 7 days
Snowfall and lying snow at the summit over the next 7 days.
Sun today
Sunrise 07:07, sunset 16:54
9h 47m of daylight. Golden hour ends 07:58 and starts 16:03. From the summit you see the sun 07:02 to 16:59.
Nearby summits
Close to Gyrn Ddu
About Gyrn Ddu
Gyrn Ddu is 522 m (1,713 ft) high with 386 m of prominence. It is in Anglesey and the Lleyn Peninsula, Wales. OS grid reference SH401467. It is the 2nd highest of the 19 summits Peakify lists in Anglesey and the Lleyn Peninsula. The nearest summits are Bwlch Mawr (2.8 km), Mynydd Carnguwch (4.7 km) and Yr Eifl (4.1 km).
How high is Gyrn Ddu?
Gyrn Ddu is 522 metres high with 386 metres of prominence.
Where is Gyrn Ddu?
Gyrn Ddu is listed in Anglesey and the Lleyn Peninsula, Wales.
Are there routes for Gyrn Ddu?
Peakify lists 4 routes for Gyrn Ddu, including available distance, ascent, start point, and difficulty details. The easiest is South Ridge Route (5km, Moderate).
Is it safe to climb Gyrn Ddu 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 Gyrn Ddu?
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.
