Cwm Silyn via Llyn Cwm Silyn
Great loop through dramatic terrain
Moderate Hiking
- Distance
- 8.7 km
- Ascent
- 499 m
- Descent
- 501 m
Explore Snowdonia National Park with curated guides of the best hiking trails, trail running routes, and more. With over 44 3D trail maps in FATMAP, you can easily discover and navigate the best trails in Snowdonia National Park.
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Get a top trail recommendation in Snowdonia National Park from one of our 2 guidebooks, or get inspired by the 44 local adventures uploaded by the FATMAP community. Start exploring now!
Great loop through dramatic terrain
Moderate Hiking
Hike and scramble to the top
Difficult Hiking
Explore Cwm Idwal's ice-sculpted beauty and dramatic mountainous scenery, rich in geological and scientific history
Easy Hiking
Llyn Idwal Circular hike, dog friendly, not technical - decent in most weathers
Moderate Hiking
All 15 of the mountains over 3000 ft in Wales
Extreme Hiking
Quieter ascent route than common routes but requires better map skills as no obvious path!
Severe Hiking
do welsh 3000s twice
Extreme Trail Running
Aber Falls - Afon Rhaiad Fawr - Llwytmor - Foel Fras - Drum - Carnedd Y Ddelw - Drosgl - Foel Ganol - Aber Falls
Difficult Hiking
Sychnant Pass - Conwy Marina Viewpoint - Mynydd Y Dref - Penmaen Bach - Alltwen - Maen Esgob - Sychnant Pass
Easy Hiking
YHA Idwal - Y Garn - Elidir Fawr - Mynydd Perfedd - Carnedd Y Filiast - Lon Las Ogwen - YHA Idwal
Difficult Hiking
Croesor - Cnicht - Cnicht North Top - Quarry - Moelwyn Mawr - Croesor
Moderate Hiking
The UK's toughest 24-hour mountain challenge - 15 peaks | 46km | 4000m ascent
Severe Hiking
An out and back run to one of the highest lakes in Wales
Moderate Trail Running
From Dolgellau, up the Pony Path, down to the Slate Bridge and back up Minfordd to Mynydd Moel
Difficult Trail Running
Scramble up Idwal Buttress into Cwm Cnefion then up Tower Rib to the Glyderau plateau
Moderate Alpine Climbing
Apex Ultra Trail Snowdonia 2021
Extreme Trail Running