Yungas Road (Bolivia) – Location, History, Facts

Yungas Road coordinates

Yungas Road is commonly mapped at approximately 16.3359° S, 68.0405° W, or -16.3359, -68.0405 in decimal degrees.

Degrees: 16.3359° S, 68.0405° W

Decimal: -16.3359, -68.0405

Where Yungas Road is located

Yungas Road lies in the Department of La Paz, extending from the western highlands toward the Nor Yungas and Yungas valleys east of the main Andean cordillera. The route runs roughly between coordinates near 16.5°S, 68.2°W on the plateau and about 15.6°S, 67.9°W in the valley lowlands. It follows the eastern escarpment of the Andes, descending from altiplano terrain into cloud-forest slopes that mark the transition to the Amazon Basin foothills.

Why Yungas Road is important

Yungas Road matters as a physical and symbolic link between contrasting ecological zones and as a corridor that shaped regional patterns of trade and settlement. Its narrow, cliffside alignment and steep gradients distinguish it from other mountain roads in Bolivia. The route attracted international attention because of its combination of extreme exposure and intensive local use, and it has appeared in documentary coverage and technical studies of mountain-road risk, erosion, and human adaptation to steep landscapes.

History of Yungas Road

The roadway was constructed during the twentieth century to provide a motor route from La Paz toward agricultural valleys in the Yungas region, replacing older mule trails and seasonal footpaths. Over successive decades the road saw incremental widening, surface repairs, and ad hoc maintenance to accommodate motor traffic on a largely single-lane alignment. Increasing concern about safety and reliability prompted the development of alternative alignments and engineering works that shifted most heavy traffic away from the original cliffside sections, while the older alignment retained its historical form and local uses.

Natural features of Yungas Road

The road consists of carved cuttings and earthen benches hewn into steep slopes, producing a narrow single-lane carriageway along long cliff faces. Surface materials ranged historically from compacted earth and gravel to partial paving in places, with many bends, blind corners, and steep switchbacks. The alignment negotiates highly incised valleys and steep geologic strata of the eastern Andes, with slopes underlain by fractured rock and weathered soils that promote slope instability and rapid runoff into the valley drainage network.

Environment, protection, and monitoring of Yungas Road

The corridor traverses the Yungas ecoregion, an area of montane cloud forest notable for biodiversity and endemic species, and falls under the jurisdiction of national and departmental road and environmental agencies. There is no universal heritage designation for the entire route, so long-term management relies on transport authorities, municipal governments, and targeted conservation programs addressing erosion, landslide risk, and habitat impacts. Monitoring and stabilization projects, together with regional planning, form the primary mechanisms for stewardship and hazard mitigation along the alignment.

Yungas Road facts

• Prison labor drawn from combatants during the Chaco conflict contributed to major construction efforts on parts of the road. The route descends roughly three thousand metres from the Andean plateau to the valley floors it serves. Local communities historically used the road to move coca and other agricultural produce to urban and market centres. Long stretches of the original alignment remained unpaved and often lacked continuous guardrails, creating a distinctive cliffside profile. Guinness World Records designated the road as the world’s most dangerous road in published listings during the late twentieth century.

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