Vinson Massif

The mountains here are made of very hard rock.

Ice and snow lie all around them.

The USGS report says the Sentinel Range is made of a rock called Crashsite quartzite, which makes the mountains very resistant to erosion.

Copernicus describes the massif as having extensive glaciers, steep snowy ridges and bare rocky peaks called nunataks that poke up through the ice. Strong winds and freezing temperatures shape the land.

Gildea and Splettstoesser note that the range is composed of Crashsite quartzite, making the Sentinel Range very resistant to erosion. The Vinson Massif and three of its near neighbors in the Sentinel Range are the highest peaks in Antarctica.

The EU's Copernicus image of the day (Sentinel-2, 7 February 2026) describes extensive glaciers, steep snow-covered ridges and nunataks protruding through the surrounding ice, a stark environment shaped by relentless winds and sub-zero temperatures.

Very few living things can survive here. It is too cold and rocky.

Most of the living things found here are lichens.

The Ellsworth Mountains are a hard place for life. One Earth, a nature group that maps ecoregions, says the average temperature is about -30°C and most ice-free ground is bare rock.

Most of the living things recorded there are lichens. Mosses and invertebrates are very rare, and no birds are recorded breeding there. A new kind of lichen, Opegrapha edsonii, was found in a 2012 study.

One Earth describes the Ellsworth Mountains Tundra ecoregion, the permanently ice-free land of the Sentinel and Heritage ranges, as the highest of Antarctica's ecoregions, with a mean elevation of 1,800 m and an average temperature of -30°C. Most ice-free ground is exposed rock, leaving very little habitat for non-microbial life.

There are very few biodiversity records, largely because of few scientific surveys and the inhospitable habitat. Most records are of lichens; mosses and invertebrates are very rare; no birds are recorded breeding. Microbial life is present, though its species richness is thought to be relatively low. A 2012 study found a new lichen, Opegrapha edsonii, living in cryoturbic soil.

Climbers carried special tools to the top to measure how high it is.

They found it was a little lower than people thought before.

Measurements of the mountain's height have changed over the years. The USGS report says the earliest survey gave 5,140 meters, and a NASA page from 2003 gave 4,897 meters.

In November 2004, a team of climbers waited about seven hours just below the summit while a GPS receiver on the top rock measured its position. The result was 4,892 meters, five meters lower than the earlier official figure.

The USGS report says measurements of Vinson's elevation have fluctuated, from an earliest surveyed 5,140 m to 4,892 m today. The American Alpine Journal reports that the Omega Foundation's GPS team (Damien Gildea of Australia and Rodrigo Fica and Camilo Rada of Chile) reached the summit on 28 November 2004 and spent seven hours just below it while the GPS ran on the highest solid rock.

The new height, 4,892 m, was 5 m lower than the previous official USGS height but within that older figure's margin of error. Temperatures that night reached -46°C.

People first climbed to the top in 1966.

It is very cold up there, even in summer, and the sun shines all day and all night.

The main summit was first climbed in December 1966. Climbers come in the Antarctic summer, when the sun shines 24 hours a day, but NASA said in 2003 that the average temperature in the climbing season is still about -29°C (-20°F).

NASA also noted that the climbing itself is not very technical, but the mountain is very isolated, which makes getting there hard: cargo planes land on skis on the ice west of the range.

The first ascent was made by a team in the 1966-67 austral summer (USGS). NASA's 2003 Earth Observatory page notes that the nearest airport is in southern Chile and that ascents are not technically difficult, but the mountain's isolation brings logistical challenges: only cargo planes can reach the smooth ice to the west of the Sentinel Range, landing on skis, and even in the summer climbing season, with 24 hours of sunlight, the average temperature is about -20°F (-29°C).

The USGS report, published in 2007, said well over 1,100 people had climbed Vinson since the first ascent.

High up, the air has less oxygen, and people can get headaches.

Going lower down helps them feel better.

On very high mountains like the Vinson Massif, visitors can get altitude sickness. The US Centers for Disease Control and Prevention (CDC) says children are as likely to get it as adults, headache is its main sign, and going down at least 300 meters helps.

Copernicus describes relentless winds and sub-zero temperatures around the massif.

The CDC's Yellow Book says any unacclimatized traveler sleeping at 2,450 m or higher is at risk of altitude illness, children are as susceptible as adults, headache is the cardinal symptom of acute mountain sickness, and a descent of 300 m or more brings rapid improvement.

The Vinson Massif's summit is about twice that 2,450 m threshold, in a place Copernicus describes as shaped by relentless winds and sub-zero temperatures.