Simien Mountains Biosphere Reserve

Lore & Background

The Simien Mountains were formed prior to the creation of the Rift Valley, from lava outpourings between 40 and 25 million years ago during the Oligocene period. The volcano is believed to have spread over more than 5000 km² and resulted in a thick sequence of basaltic lava some 3,000–3,500 m thick deposited on Precambrian crystalline basement. The major part of the mountains consists of remnants of a Hawaiian-type shield volcano, with Kidus Yared peak near its center. The extreme escarpment, extending in a southwest to northeast axis, is a precondition for the extended uplift of the whole mountain massif, which occurred primarily during the Miocene and Pliocene (30 to 5 million years ago).

Reader's Guide

The Simien Mountains Biosphere Reserve is significant for its unique geological origins, with only South Africa's Drakensberg range having been formed in the same manner. It is one of the few spots in tropical Africa where snow regularly falls. The reserve hosts endangered animals such as the walia ibex, a species of wild goat exclusively living in the Simien Mountains region, as well as the Ethiopian wolf and the gelada baboon. Local farmers have utilized terraces etched into the mountainsides for generations, and villages still practice ancient farming techniques. The region received biosphere reserve status in 2017, aimed at safeguarding its ecosystems and cultural value while advancing sustainable growth. The mountains have historical mentions from the 3rd century AD in the Monumentum Adulitanum, which described them as 'inaccessible mountains covered with snow,' and later by 17th-century Jesuit priest Jerónimo Lobo and 19th-century explorer Henry Salt. An old folklore superstition concerns Genwarar trees, which locals believed contained evil spirits and were never cut.

Did You Know?

• The Simien Mountains were formed from lava outpourings between 40 and 25 million years ago during the Oligocene period.
• The mountains are one of the few spots in tropical Africa where snow regularly falls.
• The walia ibex is a species of wild goat exclusively living in the Simien Mountains region.
• An old folklore superstition held that Genwarar trees contained evil spirits and should never be cut.

Volcanic Origins and Dramatic Terrain

The Simien Mountains owe their existence to a sequence of lava outpourings that occurred between forty and twenty-five million years ago, during the Oligocene period, predating the formation of the Rift Valley. The resulting geology is striking: a thick sequence of basaltic lava, roughly three to three and a half thousand metres deep, was deposited atop Precambrian crystalline basement rock. The bulk of the range represents the surviving remnants of a Hawaiian-type shield volcano, with peaks such as Ras Dejen, Bwahit, and Silki rising from its outer core while Kidus Yared sits near the centre. A particularly dramatic feature is a two-thousand-metre escarpment running along a southwest-to-northeast axis, which appears to have been a precondition for the broader uplift of the entire massif seventy-five million years ago. The varied geology, combined with glaciation, topography, and climate, has produced multiple soil types. Humic Andosols dominate at around three thousand metres, while shallow Andosols, Lithosols, and Haplic Phaeozems are common between two thousand five hundred and three thousand five hundred metres. Despite their grandeur, the mountains are highly eroded, a consequence of both their steep topography and generations of human land use.

Rare Fauna and Tropical Snow

The Simien Mountains occupy a remarkable ecological niche: they are one of the very few locations in tropical Africa where snow falls on a regular basis, a fact first recorded in the third-century Monumentum Adulitanum and confirmed by later travellers. This extraordinary climate supports a fauna that is both distinctive and vulnerable. The walia ibex, a wild goat found nowhere else on Earth, is the park's most iconic inhabitant. The Ethiopian wolf persists in small numbers across the highland slopes, while the gelada baboon, a primate unusual in that it feeds primarily on grass, forms social groups throughout the valleys. Caracals also roam the terrain. In 1978 the range was inscribed as a UNESCO World Heritage Site, and in 2017 it received biosphere reserve status, a designation aimed at safeguarding its exceptional ecosystems and cultural heritage while promoting sustainable growth. The combination of dramatic peaks, deep valleys, and endemic wildlife makes the area a magnet for hikers and nature enthusiasts, and the biosphere framework seeks to ensure that this fragile highland world endures for generations to come.

A Land of Exile, Snow, and Ancient Farming

Long before modern tourism, the Simien Mountains carried a weight of historical significance. In the writings of Cosmas Indicopleustes, the range is noted as a place of exile where subjects condemned by the Aksumite king were sent into banishment. The third-century Monumentum Adulitanum described them as inaccessible mountains covered with snow, noting that soldiers waded knee-deep in the white powder. Centuries later, the seventeenth-century Jesuit priest Jerónimo Lobo independently witnessed the snowfall. The Scottish traveller James Bruce, however, claimed he never saw snow in the Simiens, a claim the nineteenth-century explorer Henry Salt explained in 1814 by pointing out that Bruce had ventured no further than the foothills. Despite their rugged altitude, the mountains are dotted with villages connected by narrow tracks. Local farmers have cultivated terraces carved into the mountainsides for generations, and ancient agricultural techniques continue to be practised in the region, weaving a living cultural landscape into the dramatic highland terrain.

The Genwarar Trees and Living Superstition

Among the layered traditions of the Simien Mountains, one folklore belief stands out for its vivid detail. Documented in the early nineteenth century by Nathaniel Pearce in his travel journal, the superstition concerns a species of tree known locally as Genwarar. These trees rarely grow taller than eight feet and, when viewed from a distance, can take on a shape that resembles a human figure. The local people refuse to cut them down, driven by the conviction that doing so would bring misfortune. According to tradition, the Genwarar trees house evil spirits that were once cast out of human beings. In their undisturbed state these spirits are harmless, but the moment a tree is felled, the spirits are said to enter another person in an act of vengeance, though notably not the person who performed the cutting. Beyond their spiritual significance, the trees produce a milky substance that has practical uses: it serves as an ink for writing protective charms, which are worn on the body to cure possession and ward off evil spirits. The same milk has also been employed in treating lingering illness, blending the sacred and the medicinal in a single practice.