It's about twenty times as tall as Denali.
In other words, 123 kilometers is 19.860 times the height of Denali, and the height of Denali is 0.05035 times that amount.(a.k.a. Mount McKinley, a.k.a. Doleika, a.k.a. Traleika, a.k.a. "The Great One") (Denali National Park and Preserve, Alaska) (South peak)
The highest mountain peak in North America, Denali's South Peak measures 6.1930 kilometers above sea level at its peak. The impetus for the name Mount McKinley was US president William McKinley of Ohio, and disputes over the which of the mountain's names should be officially recognized regularly occur between Ohio Congressmen and Alaska politicians.
It's about twenty-and-a-half times as tall as Mount Logan.
In other words, 123 kilometers is 20.640 times the height of Mount Logan, and the height of Mount Logan is 0.04845 times that amount.(Kluane National Park and Reserve, Yukon, Canada) (elevation)
The highest mountain in Canada, Mount Logan has a total height of 5.960 kilometers. The high altitude and northern latitude of the mountain resulted in one-time temperature of -77.5 °C — the lowest temperature ever recorded outside of Antarctica.
It's about 21 times as tall as a Kilimanjaro.
In other words, 123 kilometers is 20.88010 times the height of a Kilimanjaro, and the height of a Kilimanjaro is 0.0478925 times that amount.(a.k.a. Mount Kilimanjaro) (Tanzania) (to Uhuru peak; 2008 gravimeter measurement)
Kilimanjaro rises to 5.890790 kilometers at its peak. An isolated peak with no surrounding mountain range, Kilimanjaro is considered the world's tallest freestanding mountain.
It's about twenty times as tall as Mount Elbrus.
In other words, 123 kilometers is 21.80 times the height of Mount Elbrus, and the height of Mount Elbrus is 0.04587 times that amount.(a.k.a. Mingi Tau, a.k.a. Эльбрус, a.k.a. იალბუზი) (Karachay-Cherkessia and Kabardino-Balkaria, Russia) (west summit)
The west summit of the dual-summit volcano Mount Elbrus is 5.6420 kilometers at its peak and is the highest peak in both Russia and the European continent. Until 1976, a cable car would take visitors to the mountain as far up as the Garabashi camp, located at an elevation of 3.80 kilometers.
It's about one-twenty-fifth as long as The Danube.
In other words, the length of The Danube is 23.10 times 123 kilometers.(a.k.a. Donau, a.k.a. Dunaj, a.k.a. Dunav, a.k.a. Duna, a.k.a. Дунав (Dunav), a.k.a. Dunărea, a.k.a. Дунáй (Dunay), a.k.a. Tuna) (from Breg Martinskapelle, Black Forest, Germany through the Danube Delta, Romania)
The Danube river runs 2,850 km in total length. Intersecting Vienna, Austria; Bratislava, Slovakia; Budapest, Hungary; and Belgrade, Serbia, the Danube touches more capital cities than any other river.
It's about thirty times as tall as a Vinson Massif.
In other words, 123 kilometers is 25.140 times the height of a Vinson Massif, and the height of a Vinson Massif is 0.03978 times that amount.(a.k.a. Mount Vinson) (Antarctica)
Mount Vinson, the highest peak of the Vinson Massif mountain, reaches 4.8920 kilometers at its peak. The mountain is named after Georgia Congressman Carl Vinson who emphatically promoted Antarctic exploration in the 1930s.
It's about thirty times as tall as a Puncak Jaya.
In other words, 123 kilometers is 25.180 times the height of a Puncak Jaya, and the height of a Puncak Jaya is 0.03971 times that amount.(a.k.a. Mt. Carstensz, a.k.a. Carstensz Pyramid, a.k.a. Nemangkawi, a.k.a. Carstensz Toppen, a.k.a. Gunung Sukarno) (Papua province, Indonesia)
The highest point in Oceania (and therefore one of the seven summits) peak of Puncak Jaya is 4.8840 kilometers. Dutch explorer Jan Carstenszoon, the mountain's namesake, is said to have been ridiculed for claiming to have seen snow near the equator when he reported his discovery of the peak in 1623.