Mount Humphreys elevation
Mount Humphreys rises to 12,637 ft (3,852 m) above sea level, the highest point in Arizona.
Published summit elevation
12,637ft
3,852 m above sea level
NGS survey mark FRISCO (PID FQ0624) · NAVD 88 (current U.S. vertical datum)
Source: NOAA National Geodetic Survey datasheet FQ0624 (mark last recovered 1965)
- USGS 3DEP grid value (secondary)
- 12,632 ft (3,850 m)
- 5 ft below the published figure. Elevation grids average each cell, so they under-read sharp summits.
- Source: USGS 3D Elevation Program
- Rise above Flagstaff, AZ
- 5,737 ft
- 12 mi from the summit; nearest incorporated place
- Source: USGS 3DEP at the town center
- Rank in state
- Highest point in Arizona
- Source: USGS Elevations and Distances
Data updated · By Ankit Kumar, compiled from public U.S. government and open datasets · How these numbers are made
Check your exact spot in the Mount Humphreys area
Elevation changes from street to street. Use your location, search an address or click the map to get the USGS value for one point. Green pins mark the points named on this page.
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Data sources:
Life at 12,632 ft
Standard-atmosphere estimates for the summit of Mount Humphreys (12,632 ft, from the USGS grid value). Weather moves the real values a little from day to day.
- Oxygen per breath
- 62 % of sea level
- Air is still 20.9% oxygen; there is just less air.
- Oxygen calculator
- Home canning
- Above 1,000 ft, USDA processing times and pressure-canner pounds go up.
- Canning adjustments · Baking
Sources: pressure from the U.S. Standard Atmosphere, 1976 (NOAA, NASA, USAF); boiling point from the Antoine equation for water (Lange's Handbook of Chemistry); canning thresholds from the USDA Complete Guide to Home Canning. Not medical or food-safety advice; follow the tested USDA recipe for your altitude.
Health note: the CDC says unacclimatized travelers risk altitude illness when sleeping at about 8,000 ft or higher, and sometimes lower. This page is general information, not medical advice; read the CDC guidance on high-altitude travel and talk to a clinician before a high climb.
Mount Humphreys and other Arizona peaks on this site
- Mount Humphreys12,637 ft
- Mount Lemmon9,188 ft
- Mount Hayden8,364 ft
Landmark elevations
| What | Value | Source |
|---|---|---|
| Published summit elevation | 12,637 ft (3,852 m) | NOAA National Geodetic Survey datasheet FQ0624 (mark last recovered 1965) |
| Highest USGS 3DEP value near the summit | 12,632 ft (3,850 m) | USGS 3DEP, 81 points within 250 m |
| USGS 3DEP at the GNIS summit point | 12,632 ft (3,850 m) | USGS 3DEP + GNIS coordinates |
| Nearest town: Flagstaff, AZ | 6,900 ft (2,103 m) · 12 mi away | Census Gazetteer + USGS 3DEP |
| Nearest public airport: Flagstaff Pulliam (KFLG) | 7,015 ft (2,138 m) · 14 mi away | FAA field elevation |
| Aubineau Peak (nearby summit) | 11,836 ft (3,608 m) · 1.2 mi away | GNIS position, USGS 3DEP at that point |
| Agassiz Peak (nearby summit) | 12,324 ft (3,756 m) · 1.4 mi away | GNIS position, USGS 3DEP at that point |
| Rees Peak (nearby summit) | 11,461 ft (3,493 m) · 1.6 mi away | GNIS position, USGS 3DEP at that point |
| Fremont Peak (nearby summit) | 11,951 ft (3,643 m) · 1.9 mi away | GNIS position, USGS 3DEP at that point |
| Doyle Peak (nearby summit) | 11,440 ft (3,487 m) · 2.1 mi away | GNIS position, USGS 3DEP at that point |
Mount Humphreys at a glance
| What | Value | Source |
|---|---|---|
| County | Coconino | USGS GNIS |
| USGS 7.5-minute topo map | Humphreys Peak | USGS GNIS |
| Summit coordinates | 35.34632, -111.67799 | USGS GNIS |
| Name in GNIS | Humphreys Peak | USGS GNIS |
More peaks and tools
- Mount Hayden, AZ — 8,364 ft, 66 mi away
- Mount Lemmon, AZ — 9,188 ft, 207 mi away
- Mount Charleston, NV — 11,916 ft, 234 mi away
- Mount Sneffels, CO — 14,158 ft, 283 mi away
- Mount San Jacinto, CA — 10,796 ft, 304 mi away
- All Arizona elevations
Frequently asked questions
How tall is Mount Humphreys?
Mount Humphreys is 12,637 ft (3,852 m) above sea level, according to NOAA National Geodetic Survey datasheet FQ0624 (mark last recovered 1965), on the NAVD 88 datum. The highest USGS 3DEP grid value near the summit is 12,632 ft.
Why does the USGS map value differ from the published height of Mount Humphreys?
The USGS 3D Elevation Program stores ground elevation as a grid of cells. Each cell holds one value for its whole area, so a pointed summit is averaged with the slopes around it and the grid reads lower than a survey of the top. Here the difference is 5 ft.
Where is Mount Humphreys?
Mount Humphreys is in Coconino County, Arizona, at 35.3463, -111.6780, about 12 mi from Flagstaff. It appears on the USGS Humphreys Peak 7.5-minute topographic map.
How much oxygen is there at the top of Mount Humphreys?
At 12,632 ft, water boils at about 188.9 °F (87.2 °C) and standard air pressure is 18.56 inHg (629 hPa), so each breath holds about 62% of the oxygen it would at sea level. The CDC says unacclimatized travelers risk altitude illness when they sleep at about 8,000 ft or higher, and sometimes lower.
What is the closest airport to Mount Humphreys?
The nearest public-use airport is Flagstaff Pulliam (KFLG), 14 mi away in a straight line, at 7,015 ft (FAA).
Sources
- NOAA National Geodetic Survey datasheet FQ0624 (mark last recovered 1965) — elevation of NGS survey mark FRISCO (PID FQ0624)
- USGS Elevation Point Query Service (3DEP) — grid elevation near the summit, nearby summits and the nearest town
- USGS Geographic Names Information System (GNIS), Domestic Names — summit name, position, county and topo map
- U.S. Census Bureau, 2024 Gazetteer Files (places) — nearest incorporated town
- FAA Aeronautical Information Services, Airports (field elevation) — airport field elevation
- U.S. Standard Atmosphere, 1976 (NOAA/NASA/USAF); water boiling point by the Antoine equation (Lange’s Handbook of Chemistry) — boiling point, air pressure and oxygen
- CDC Yellow Book: High-Altitude Travel and Altitude Illness — altitude illness threshold
How each number is produced: methodology and data sources.
Data updated · By Ankit Kumar, compiled from public U.S. government and open datasets · How these numbers are made