Three Forks, MT Elevation & Topographic Map

Elevation

4,260 ft 1,300 m4,210 ft 1,285 m4,190 ft 1,275 m4,140 ft 1,260 m4,090 ft 1,245 m4,060 ft 1,240 m

Contours every 100 ft, bold every 500 ft

USGS 3DEP · U.S. Census Bureau

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How to use this mapviews, tools and data

Elevation: Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
Satellite: A 2016 satellite photo at 33 ft (10 m) detail; contours off.
3D: Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
Click or tap anywhere: The exact elevation of that spot in ft and m.
Measure: Pick two points for the climb, descent and grade along a straight line.
City area: Fades everything outside the official city limits (US Census).

Elevation Data

Three Forks sits at about 4,070 ft (1,240 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation

4,070 ft 1,240 m

most residents: 4,070–4,080 ft

Lowest

4,060 ft 1,240 m

on the northeast side

Highest

4,260 ft 1,300 m

on the southeast side

Average

4,080 ft 1,245 m

all land inside city limits

Three Forks spans about 200 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.

Figure	Elevation
Typical Where people live: half of residents higher, half lower	4,070 ft1,240 m
Highest point Inside city limits, on the southeast side	4,260 ft1,300 m
Lowest point Inside city limits, on the northeast side	4,060 ft1,240 m
Town center USGS map point for Three Forks	4,070 ft1,240 m
Airport (9S5) FAA airport elevation, the highest point of its runways	4,089 ft1,246 m
Average of all land	4,080 ft1,245 m

Altitude Effects

What 4,070 ft means day to day, worked out from the typical elevation.

Water boils at

204.4 °F95.8 °C

vs 212 °F at sea level; USDA: food takes longer to cook.

Air pressure

86% of sea level

25.8 inHg (87.3 kPa): each breath holds 14% less air.

Oxygen equivalent

18.0% at sea level

Air is still 21% oxygen, just thinner. Normal at the coast: 20.9%.

Sunburn

+8% more UV

EPA: UV rises about 2% for every 1,000 ft.

Topographic Map

Location: City in Gallatin County, Montana, United States
Population: 1,945 2024 est.
Land area: 1.4 sq mi + 0.1 sq mi water
Density: 1,352 per sq mi
Coordinates: 45.8924° N, 111.5522° W
Time zone: Mountain UTC−7 / −6
Landform region: Northern Rocky Mountains
Drains to: Missouri River → Mississippi River → Gulf of America
Airport: Three Forks (9S5) 4,089 ft
ZIP codes 1: 59752

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Sources: U.S. Census Bureau, USGS, FAA

Nearby Places

Nearby towns by typical elevation

Harrison4,910 ft
Churchill4,570 ft
Amsterdam4,490 ft
Gallatin River Ranch4,440 ft
Wheatland4,320 ft
Cardwell4,280 ft
Manhattan4,250 ft
Ponderosa Pines4,230 ft
Willow Creek4,170 ft
Logan4,110 ft
Three Forks4,070 ft

Rankings by typical elevation

Towns in Montana146th highest of 497
Towns in Gallatin Countylowest of 19

Peaks and hills nearest, by height

Brownback Mountain9,260 ft
Blacktail Mountain, Gallatin County8,381 ft
Sixmile Mountain7,639 ft
Doherty Mountain6,390 ft
London Peak6,330 ft

How we measure

Typical elevation: the population-weighted median: every 2020 Census block inside the city limits, at its USGS 3DEP height, weighted by the people who live there. Half of residents live higher, half lower.
Lowest, highest, average: USGS 3DEP bare-earth heights on a 1 arc-second (≈100 ft, 30 m) grid, land only, inside the Census city limits (TIGER, Jan 1 2026).
Nearby Places: nearby towns and rankings use each town's typical elevation, so every town is compared like for like. Rankings count every city, town, township and census-designated place, including places inside a town. Peaks and hills: the nearest summits with at least 980 ft (300 m) of prominence within 62 mi (100 km), then federal (GNIS) summits within 16 mi (25 km) when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
Altitude effects: standard-atmosphere formulas applied to the typical elevation; UV from EPA's rule of thumb (about 2% per 1,000 ft).
Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (FAA airport elevation, NGS survey heights) are shown as their publisher gives them.
Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, 2024 population estimates, Gazetteer areas, ZIP code areas); FAA airport data; BTS time zones; NOAA NGS survey heights. All public domain.