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Also on the map ofSnowdonia‹ Cambrian Mountains

Lake · Wales

Marchlyn Mawr

623 m2,044 ft
Area
0.25 km²
Tonight
4°CCloudy · Wind 19 km/h W

Marchlyn Mawr is a lake at 623 m above sea level in Wales, United Kingdom, 0.25 km² in area and 0.7 km long.

All facts
Surface elevation
623 m
Length
0.7 km
Shoreline
2.0 km
Open the 3D view
Lake

Marchlyn Mawr in numbers

Shoreline from OpenStreetMap.

0.7 km longest200 mN ↑
Shoreline
2.0 km≈30 min to walk around
3D map

Marchlyn Mawr 3D map

Drag to orbit · click, then scroll to zoom (or Ctrl/⌘ + scroll) · One finger scrolls the page · two fingers orbit and zoom · 4 × 4 km

Surface
Vertical scale
Topographic map

Marchlyn Mawr terrain and contours

25 m contours from the Copernicus GLO-30 terrain model. Click two points on the map to draw your own cross-section.Tap two points on the map to draw your own cross-section.

Index contours every 125 mShowing west → east through the centre

Marchlyn Mawr elevation profile

West → east through the centre

Hover the profile to read elevation and distance.Tap or drag along the profile to read elevation and distance.
Weather

Marchlyn Mawr weather

Tonight · Cloudy · 4°C (39°F) · 0.6 mm · Wind 19 km/h W

Marchlyn Mawr forecast for about 623 m.

  • Tonight4°0.6 mm19 km/h W
  • Today4°11°27.1 mm54 km/h W
  • Sun5°7°3.0 mm48 km/h W
  • Mon5°11°21.6 mm41 km/h S
  • Tue6°9°7.2 mm43 km/h SW
  • Wed7°10°1.1 mm25 km/h SW
  • Thu7°9°0.7 mm16 km/h S
  • Fri7°10°3.0 mm16 km/h SE
  • Sat4°8°2.9 mm17 km/h NW
  • Sun2°4°8.9 mm19 km/h NW

Forecast data: MET Norway, CC BY 4.0; daily low and high, precipitation total and strongest wind from the hourly data, model run Oct 24, 01:17 UTC.

Camping & parking

Camping & parking near Marchlyn Mawr

Campsites, parking, trailheads and mountain huts mapped in OpenStreetMap around Marchlyn Mawr, nearest first, by straight-line distance. Check access, fees and permits locally.

  • Nearest parking

    Dinorwig walk Parking

    2.8 km WSW · +2 more within 2.6 km

    DirectionsMap

  • Nearest hut

    Tŷ Powdwr

    3.3 km WSW · +2 more within 3.7 km

    DirectionsMap

  • Nearest campsite

    YHA Idwal

    3.5 km ESE · +2 more within 3.7 km

    DirectionsMap

  • Nearest caravan site

    Bryn Llys Caravan Site

    4.3 km N · +2 more within 5.5 km

    DirectionsMap

  • Nearest trailhead

    Start of Llanberis Path (Snowdon)

    4.4 km SW

    DirectionsMap
All mapped places 13
PlaceDistance
Parking2.6 km E
Parking2.6 km E
Dinorwig walk ParkingParking2.8 km WSW
Tŷ PowdwrHut3.3 km WSW
FronwydyrHut3.4 km SSW
YHA IdwalCampsite3.5 km ESE
Campsite3.7 km SSW
Pritchard's CampsiteCampsite3.7 km SSW
Lletty LlwydHut3.7 km W
Bryn Llys Caravan SiteCaravan site4.3 km N
Start of Llanberis Path (Snowdon)Trailhead4.4 km SW
Llanberis Touring ParkCaravan site4.6 km WSW
Caravan site5.5 km WNW
Slope

Slope

Share of the 4 × 4 km view by steepness, from the 30 m model.

Mixed terrain: gentle slopes, steep faces and everything between.

Gentle, 0–15°
32.8%
Moderate, 15–30°
49.1%
Steep, 30–45°
16.4%
Cliffs, 45° and over
1.6%
Steeper than 30°
18.0% of the 16 km² view
Relief in view
719 m low point 196 m
Land cover

Land cover

ESA WorldCover 10 m classification of the same area.

Grassland 92.3%Trees 2.1%Water 2.1%Bare rock / sparse 1.9%Built-up 1.6%

Snow & ice means glaciers and year-round snow (a yearly average), not today’s snow cover.

Nearby summits

Nearby summits

Named peaks within 2 km of Marchlyn Mawr.

NESW1 km2 km123
Summit list 3
  1. 1Carnedd Y Filiast821 m 0.8 km NNE
  2. 2Elidir Fawr923 m 0.8 km SSW
  3. 3Foel Goch831 m 1.4 km ESE
Wildlife

Wildlife seen nearby

Sightings of the most-seen species on iNaturalist (research grade) within 2 km; 55 species recorded in all.

Sightings per species 6
  • Stag's-horn clubmoss4
  • Common heather3
  • Northern Wheatear2
  • Meadow Pipit2
  • Northern firmoss2
  • Fox Moth2
Where it sits

Where Marchlyn Mawr sits

Range
Cambrian Mountains19Snowdonia15
Region
Wales60United Kingdom371Europe2,143
Nearby

Nearby places

More 1
More in the Snowdonia 6
See all 15 in the Snowdonia →
Downloads

Marchlyn Mawr downloads: topographic map, heightmap, STL 3D model and DEM

Free files made in your browser from this page's terrain data. No sign-up; credit the sources below.

Print & wall
3D printing & 3D apps
GIS & GPS
</>Embed this mapPaste this into your site to show the interactive 3D terrain, with a credit link back here.<iframe src="https://topolu.com/embed/marchlyn-mawr" width="100%" height="480" style="border:0" loading="lazy" allowfullscreen title="3D terrain of Marchlyn Mawr"></iframe> <p><a href="https://topolu.com/marchlyn-mawr" rel="nofollow">Topolu</a></p>

Free to use with credit: see the data sources

Sources

Data sources

Terrain
Produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved. The European Union, ESA, DLR and Airbus incur no liability for any use of this data and do not endorse this service.
Imagery
Contains modified Copernicus Sentinel data 2026 (scene 2026-07-15)
Land cover
© ESA WorldCover project 2021 / Contains modified Copernicus Sentinel data (2021) processed by ESA WorldCover consortium
Facts
Wikidata (CC0)
Camping & parking, Geometry
© OpenStreetMap contributors (ODbL)
Summits
© OpenStreetMap contributors, via Overture Maps Foundation (ODbL)
Wildlife
iNaturalist community observations, counts only
Forecast
Weather forecast from MET Norway (CC BY 4.0)
Sources
Wikidata · GeoNames · Wikipedia