Routes up
Pen y Boncyn Trefeilw routes: 2 ways to the top
Cwm Hirnant by the Bwlch Hirnant trackHiking · 3.2 km one way · 300 m ascent · ~1h 10m · from Cwm Hirnant public track at SH952299Hard
Cwm Hirnant by the forest tracksHiking · 4.2 km one way · 330 m ascent · ~1h 25m · from Cwm Hirnant public track at SH949308Hard
Summit today
Is it safe to climb Pen y Boncyn Trefeilw today?
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Cloud inversion · 7 days
The chance of standing above a sea of cloud on Pen y Boncyn Trefeilw each morning this week, from overnight temperature, humidity and low cloud below the 644m summit.
Dark sky · 7 days
How dark the sky gets over Pen y Boncyn Trefeilw 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 07:04, sunset 16:51
9h 48m of daylight. Golden hour ends 07:54 and starts 16:00. From the summit you see the sun 06:58 to 16:56.
Nearby summits
Close to Pen y Boncyn Trefeilw
About Pen y Boncyn Trefeilw
Pen y Boncyn Trefeilw is 644 m (2,114 ft) high with 55 m of prominence. It is in Snowdonia, Wales. It is the 101st highest of the 152 summits Peakify lists in Snowdonia. The nearest summits are Stac Rhos (0.8 km), Pen y Cerrig Duon (1.0 km) and Cefn Gwyntog North Top (1.5 km).
How high is Pen y Boncyn Trefeilw?
Pen y Boncyn Trefeilw is 644 metres high with 55 metres of prominence.
Where is Pen y Boncyn Trefeilw?
Pen y Boncyn Trefeilw is listed in Snowdonia, Wales.
Are there routes for Pen y Boncyn Trefeilw?
Peakify lists 2 routes for Pen y Boncyn Trefeilw, including available distance, ascent, start point, and difficulty details. The easiest is Cwm Hirnant by the Bwlch Hirnant track (3.2 km one way, Hard).
Is it safe to climb Pen y Boncyn Trefeilw 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 Pen y Boncyn Trefeilw?
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.
