Longmont, CO Elevation & Topographic Map
Elevation
5,130 ft 1,565 m5,060 ft 1,540 m5,020 ft 1,530 m4,950 ft 1,510 m4,880 ft 1,490 m4,850 ft 1,480 m
Contours every 100 ft, bold every 500 ft
USGS 3DEP · U.S. Census Bureau
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
Longmont sits at about 5,030 ft (1,530 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
5,030 ft 1,530 m
most residents: 4,970–5,070 ft
Lowest
4,850 ft 1,480 m
on the east side
Highest
5,130 ft 1,565 m
on the northwest side
Average
5,000 ft 1,525 m
all land inside city limits
Longmont spans about 280 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 | 5,030 ft1,530 m |
| Highest point Inside city limits, on the northwest side | 5,130 ft1,565 m |
| Lowest point Inside city limits, on the east side | 4,850 ft1,480 m |
| Town center USGS map point for Longmont | 4,980 ft1,520 m |
| Airport (LMO) FAA airport elevation, the highest point of its runways | 5,055 ft1,541 m |
| Average of all land | 5,000 ft1,525 m |
Elevation profile, south to north
5.0 mi south to north through the town center.
Altitude Effects
What 5,030 ft means day to day, worked out from the typical elevation.
Water boils at
202.7 °F94.8 °C
vs 212 °F at sea level; USDA: food takes longer to cook.
Air pressure
83% of sea level
24.9 inHg (84.2 kPa): each breath holds 17% less air.
Oxygen equivalent
17.4% at sea level
Air is still 21% oxygen, just thinner. Normal at the coast: 20.9%.
Sunburn
+10% more UV
EPA: UV rises about 2% for every 1,000 ft.
Topographic Map
- Location
- City in Boulder and Weld counties, Colorado, United States
- Population
- 99,818 2024 est.
- Land area
- 29.3 sq mi + 2.0 sq mi water
- Density
- 3,409 per sq mi
- Coordinates
- 40.1672° N, 105.1019° W
- Time zone
- Mountain UTC−7 / −6
- Landform region
- Great Plains
- Drains to
- Saint Vrain Creek → South Platte River → Middle Channel Platte River → Platte River → Missouri River → Mississippi River → Gulf of America
- Airport
- Vance Brand (LMO) 5,055 ft
- ZIP codes 3
- 80501 80503 80504
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
Rankings by typical elevation
- Towns in Colorado364th highest of 484
- Towns in Boulder Countylowest of 32
Peaks and hills nearest, by height
- Longs Peak14,250 ft
- Copeland Mountain13,170 ft
- Twin Sisters Mountain11,400 ft
- Starr Peak10,510 ft
- Deer Mountain10,010 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).
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, 4,840 ft at 40.1526° N, 105.0182° W, is in such a hollow or patch and is not counted.
- 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. All public domain.