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Chimborazo
Chimborazo from the SW
Elevation	6,268.2 metres (20,565 ft) [1]
Location	Ecuador
Range	Andes, Cordillera Occidental
Prominence	4,123 m Ranked 17th
Coordinates	01°28′09″S, 78°49′03″W
Topo map	IGM, CT-ÑIV-C1 [1]
Type	Stratovolcano
Age of rock	Paleogene (Gomez 1994)
Last eruption	640 CE ± 500 years (Smithsonian n.d., [2])
Easiest route	glacier/snow climb PD

Ecuador Portal

The inactive stratovolcano Chimborazo (pronounced [tʃimboˈraso]) is Ecuador's highest summit. Its last eruption is thought to have occurred some time in the first millennium CE. Its summit is generally regarded as the spot on the surface farthest from the center of the Earth, measuring 20,946,232 feet (6,384,412 m) from the Earth's core to the peak^[2].

The shadow of Chimborazo as seen from the summit at sunrise

Chimborazo is located in the Cordillera Occidental of the Andes of central Ecuador, 150 km (93 miles) south-southwest of the capital Quito. It's neighbored by 5,018 m high Carihuairazo. Chimborazo's majestic summit rises 2,500 m above the surrounding highlands (~3,500 to 4,000 m) with a ~20 km wide base. Under perfect clear conditions the summit of Chimborazo can be seen from the coastal city Guayaquil. The nearest cities are Riobamba (~30km to the southeast), Ambato (~30km to the northeast) and Guaranda (~25km to the southwest).Chimborazo is surrounded by the "Reserva de Produccion Faunistica Chimborazo" which forms a protected ecosystem to preserve the habitat for the andes native camelids Vicuña, Llama and Alpaca.

False-color satellite image of Chimborazo (bright blue mass in the center left) and its neighbor Tungurahua (center right, with plume of ash).

The top of Chimborazo is completely covered by glaciers with some north-eastern glacier arms flowing down to 4,600 m. Its glacier is the source of water for the population of the Bolivar and Chimborazo provinces of Ecuador. Chimborazo glacier's ice mass has decreased over the past decades due to influence of global warming,^{[citation needed]} ash covers from recent volcanic activity^[3] of Tungurahua (Schotterer et al 2003) and the El Niño phenomenon (Chaffaut & Guillaume 2004, [3]).

As on other glaciated Ecuadorian mountains, Chimborazo's glacial ice is mined by locals (the so called Hieleros from span. Hielo for Ice) to be sold in the markets of Guaranda and Riobamba. In earlier days the ice was transported down to coastal towns like Babahoyo or Vinces (Borja 2004).

Chimborazo is a dominantly andesitic-dacitic stratovolcano. About 35,000 years ago a collapse of Chimborazo produced a debris avalanche, the deposits of which underlie Riobamba. Chimborazo then erupted several times during the Holocene, the last time around 640 AD ± 500 years (Smithsonian n.d., [4]). Today Chimborazo is considered inactive.

With an elevation of 6,268 m^[1], Chimborazo is the highest mountain in Ecuador and the northern Andes (north of Peru); it is higher than any more northerly summit in the Americas.

The summit of Mount Everest reaches a higher elevation above sea level, but the summit of Chimborazo is widely reported to be the farthest point from Earth's center (Senne 2000, [5]), despite a possible challenge from Huascarán.^[4] Chimborazo is just one degree south of the equator and the earth's diameter at the equator is greater than at Everest's latitude (nearly 28° north), with sea level also being elevated. So, despite being 2,581 m (8,568 ft) lower in elevation above sea level, it is 6,384.4 km (3,968 mi) from the Earth's center, 2.1 km farther than the summit of Everest.^[5]

Alexander von Humboldt and Aimé Bonpland at the Chimborazo base

Several theories regarding the origin of the name Chimborazo exist. After one theory it is a combination of the Cayapa Schingbu for Women and the Colorado/Quichua Razo for Ice/Snow resulting in Women of Ice. After another theory Chimbo is Jivaro for Throne of Master/God resulting in Icethrone of God. The locals also used to call the mountain Urcorazo, with the Quichua Urco for Mountain resulting in Mountain of Ice (Schmudlach 2001). For the local indigenous mysticism the Chimborazo represents Taita (Father) whereas neighbouring Tungurahua is seen as Mama, Taita Chimborazo and Mama Tungurahua.

Until the beginning of the nineteenth century it was thought that Chimborazo was the highest mountain on Earth (measured from sea level), and such reputation led to many attempts on its summit during the seventeenth and eighteenth centuries. In 1802 during his expedition to South America, Baron Alexander von Humboldt, accompanied by Aimé Bonpland and the Ecuadorian Carlos Montúfar attempted to reach the summit. From his description of the mountain it seems he reached a point at 5,875 m, from where he and his companions returned suffering from altitude sickness. At that point they had reached the highest point attained by any European in recorded history.^[6] Chimborazo's summit was then first climbed by Briton Edward Whymper and the brothers Louis and Jean-Antoine Carrel in 1880. As there were many critics who doubted that Whymper had reached the summit, later in the same year he climbed to the summit again choosing a different route (Pogyos) with the Ecuadorians David Beltrán and Francisco Campaña (Whymper 1892).

In August 1976 SAETA flight 232 (a Vickers Viscount with 4 Crew members and 55 Passengers) was reported missing while in flight from Quito to Cuenca. Immediate extensive searches of the possible crash area did not produce any evidence. A crash on Chimborazo was considered to be most probable, while some speculated about hijacking by Colombian Guerillas. In October 2002, after having been missing for 26 years, the aircraft and the bodies of its 59 occupants were found on Chimborazo by Ecuadorian andinists climbing on a seldom used eastern route (Integral) at a height of 5,400 m (El Comercio 2003).

• Chimborazo is featured on the Ecuadorian coat of arms, to represent the beauty and richness of the Ecuadorian Sierra (Highlands).
• Simón Bolívar wrote a poem inspired by the mountain, entitled "Mi delirio sobre el Chimborazo".

As Ecuador's highest mountain, Chimborazo is a very popular climb.

• Chimborazo can be climbed year round with the best seasons being December-January and July-August.
• A good height acclimatization is highly recommended for this climb.
• The mountain is contained on the IGM (Instituto Geografico Militar) 1:50000 Map Chimborazo (CT-ÑIV-C1) (IGM 1991, [6]).

Sketch of Chimborazo Huts, main Summits and Routes

The easiest (Grade: PD) and most climbed routes are the Normal and the Whymper route. Both are western ridge routes starting at the Whymper hut and leading via the Ventemilla summit to the main (Whymper) summit. There are several other less used and more challenging routes on the other mountains faces and ridges leading to one of Chimborazo's summits: Main (Whymper, Ecuador), Politecnico (Central), N. Martinez (Eastern).

There are two functioning Huts, the Carrel Hut (4,850 m) and the nearby Whymper Hut (5,000 m). The Carrel Hut can be reached by car from Riobamba, Ambato or Guaranda. On the north-west side there is the now defunct Zurita hut (4,900 m) which served as base for the Pogyos route.

• Borja, Carmen (2004). "Hieleros del Chimborazo. Entrevista a Igor Guayasamín". Ecuador Terra Incognita 29. 
• Chaffaut, Isabelle; Marie Guillaume (2004). El Niño and glacier melt in the tropical Andes. innovations report. Retrieved on 2006-08-08.
• El Comercio. "Different Saeta Chimborazo accident articles", El Comercio, Quito, February to May 2003. (Spanish) 
• Gomez, Nelson (1994). Atlas del Ecuador. Editorial Ediguias. ISBN 9978-89-009-2. 
• IGM (Instituto Geografico Militar, Ecuador) (1991). Chimborazo Ecuador, CT-ÑIV-C1. Retrieved on 2006-07-18.
• Schmudlach, Günter (2001). Bergführer Ecuador. Panico Alpinverlag. ISBN 3-926807-82-2. 
• Schoterer, Ulrich; Grosjean M., Stichler W, Ginot P et al (2003). "Glaciers and Climate in the Andes between the Equator and 30° S: What is Recorded under Extreme Environmental Conditions?". Climatic Change 59. 
• Senne, Joseph H. (May 2000). "Did Edmund Hillary Climb the Wrong Mountain". Professional Surveyor 20 (5). Retrieved on 2007-02-04. 
• Smithsonian, Global Volcanic Program. Chimborazo Summary. Smithsonian. Retrieved on 2006-07-18.
• Whymper, Edward (1892). Travels Amongst the Great Andes of the Equator. John Murray. ISBN 1-904466-24-9. 

Wikimedia Commons has media related to:

Chimborazo

• Climbing information for Chimborazo
• Smithsonian Institution Global Volcanism Program: Chimborazo
• A short excursion to Chimborazo's Whymper Refuge