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Lake · Wales

Alwen Reservoir

333 m1,093 ft
Tonight
6°CCloudy · Wind 19 km/h W

Alwen Reservoir is a lake at 333 m above sea level in Wales, United Kingdom.

All facts
Surface elevation
333 m
Open the 3D view
3D map

Alwen Reservoir 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

Alwen Reservoir terrain and contours

10 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 50 mShowing west → east through the centre

Alwen Reservoir 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

Alwen Reservoir weather

Tonight · Cloudy · 6°C (43°F) · Wind 19 km/h W

Alwen Reservoir forecast for about 333 m.

  • Tonight6°–19 km/h W
  • Today6°13°19.3 mm45 km/h W
  • Sun7°9°1.6 mm45 km/h W
  • Mon7°14°9.2 mm43 km/h SW
  • Tue8°11°4.4 mm40 km/h SW
  • Wed9°12°0.4 mm26 km/h SW
  • Thu9°11°–17 km/h S
  • Fri9°11°5.6 mm22 km/h SE
  • Sat5°10°1.8 mm18 km/h NW
  • Sun4°6°14.6 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 Alwen Reservoir

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

  • Nearest parking

    0.6 km ESE

    +2 more within 2.1 km

    DirectionsMap

  • Nearest caravan site

    2.3 km E

    +2 more within 5.0 km

    DirectionsMap

  • Nearest campsite

    Hafod Hall

    3.1 km NNW · +2 more within 5.8 km

    DirectionsMap
All mapped places 9
PlaceDistance
Parking0.6 km ESE
Parking2.0 km NE
Parking2.1 km NE
Caravan site2.3 km E
Hafod HallCampsite3.1 km NNW
Caravan site4.8 km SW
Campsite4.9 km SW
Fron-deg Caravan ParkCaravan site5.0 km S
Llwyn Onn CampsiteCampsite5.8 km WSW
Slope

Slope

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

Mostly gentle: 93% of the view is under 15°.

Gentle, 0–15°
92.5%
Moderate, 15–30°
7.2%
Steep, 30–45°
0.2%
Cliffs, 45° and over
0.0%
Steeper than 30°
0.2% of the 16 km² view
Relief in view
183 m low point 294 m
Land cover

Land cover

ESA WorldCover 10 m classification of the same area.

Grassland 48.3%Trees 42.0%Water 9.3%

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

Wildlife

Wildlife seen nearby

Sightings of the most-seen species on iNaturalist (research grade) within 2 km; 75 species recorded in all.

Sightings per species 6
  • Fly Agaric6
  • Cuckooflower3
  • European Common Frog2
  • Bull Thistle2
  • European mountain ash2
  • Conifer Mazegill2
Where it sits

Where Alwen Reservoir sits

Region
Wales60United Kingdom371Europe2,143
Nearby

Nearby places

More 1
Downloads

Alwen Reservoir 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/alwen-reservoir" width="100%" height="480" style="border:0" loading="lazy" allowfullscreen title="3D terrain of Alwen Reservoir"></iframe> <p><a href="https://topolu.com/alwen-reservoir" 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