Lake · Montana

Flathead Lake

881 m2,890 ft

Area: 495 km²
Max depth: 113 m
Tonight: 38°FPartly cloudy · Wind 2–6 mph N

Flathead Lake is a lake at 881 m above sea level in Montana, United States, 495 km² in area and 47.0 km long.

All facts

Surface elevation: 881 m
Length: 47.0 km
Shoreline: 296.7 km

Open the 3D view

Lake

Flathead Lake in numbers

Shoreline from OpenStreetMap.

Shoreline: 296.7 km

3D map

Flathead Lake 3D map

Drag to orbit · click, then scroll to zoom (or Ctrl/⌘ + scroll) · One finger scrolls the page · two fingers orbit and zoom · 20 × 20 km

Surface

Vertical scale

Topographic map

Flathead Lake terrain and contours

50 m contours from the USGS 3DEP 10 m 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 250 mShowing west → east through the centre

Flathead Lake 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

Flathead Lake weather

Tonight · Partly cloudy · 38°F (3°C) · 8% chance of precipitation · Wind 2–6 mph N

Flathead Lake forecast for about 875 m.

Tonight38°8%2–6 mph N
Sat37°52°1%1–7 mph SSW
Sun35°52°–5–10 mph N
Mon38°52°34%1–6 mph N
Tue37°50°64%5 mph WSW
Wed32°46°38%2–8 mph NNE
Thu32°46°17%1–5 mph N

Forecast data: NOAA National Weather Service, public domain, model run Oct 23, 20:01 UTC.

Slope

Share of the 20 × 20 km view by steepness, from the 10 m model.

Mostly gentle: 83% of the view is under 15°.

Gentle, 0–15°

83.4%

Moderate, 15–30°

15.1%

Steep, 30–45°

1.4%

Cliffs, 45° and over

0.1%

Steeper than 30°: 1.5% of the 400 km² view
Relief in view: 811 m low point 880 m

Land cover

ESA WorldCover 10 m classification of the same area.

Water 64.8%Trees 26.3%Grassland 8.4%

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 10 km; 322 species recorded in all.

Sightings per species 6

Bighorn Sheep39
Creeping mahonia31
Mule Deer24
Baker's Mariposa Lily24
Bald Eagle23
Western Ponderosa Pine23

Where it sits

Where Flathead Lake sits

Nearby

Nearby places

More 1

Logan Pass2,025 m94 km NNE

Downloads

Flathead Lake 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

JPGFlathead Lake satellite image (JPEG)Sentinel-2 true-colour image of the same area, taken 2026-07-31.

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/flathead-lake" width="100%" height="480" style="border:0" loading="lazy" allowfullscreen title="3D terrain of Flathead Lake"></iframe>
<p><a href="https://topolu.com/flathead-lake" rel="nofollow">Topolu</a></p>

Free to use with credit: see the data sources

Sources

Data sources

Terrain: U.S. Geological Survey, 3D Elevation Program (public domain)
Imagery: Contains modified Copernicus Sentinel data 2026 (scene 2026-07-31)
Land cover: © ESA WorldCover project 2021 / Contains modified Copernicus Sentinel data (2021) processed by ESA WorldCover consortium
Facts: Wikidata (CC0)
Wildlife: iNaturalist community observations, counts only
Panorama: Includes Copernicus WorldDEM-90 © 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.
Forecast: Weather forecast from NOAA National Weather Service (public domain)
Sources: Wikidata · GeoNames · Wikipedia