El Tigre

The Sierra El Tigre of northeastern Sonora is a rugged Sky Island mountain range. It covers substantial terrain – its basal area spreads out over 600 square miles. Surrounded by the Rio Bavispe valley on three sides, it is somewhat isolated from neighboring high country, except from the south where it is nearly a peninsular extension from the spine of the Sierra Madre Occidental. The Sierra El Tigre is separated from the Sierra Madre by a pass of rugged hills that rise to around 1,200 to 1,600 meters (INEGI, 1998).

The Sierra El Tigre’s altitudinal gradient and rugged topography influence its microclimates, soil types and vegetation, translating to diverse flora and fauna, as well as economic and cultural land use by human settlements (SEMARNAT). Historically, the Sierra El Tigre was one of the last places for Apache resisters to take refuge from a changing region. Apaches used the rugged terrain as protection from Mexican and U.S. Apache hunting parties as late as the 1930’s.

Most of the Sierra El Tigre is located within the boundary of the Ajos-Bavispe Reserve, which provides limited protection of the environment.

Highest Point: 
2,360 meters
Sierra El Tigre

Sierra El Tigre

The Sierra El Tigre of northeastern Sonora is a rugged Sky Island mountain range. It covers substantial terrain – its basal area spreads out over 600 square miles. Surrounded by the Rio Bavispe valley on three sides, it is somewhat isolated from neighboring high country, except from the south where it is nearly a peninsular extension from the spine of the Sierra Madre Occidental. The Sierra El Tigre is separated from the Sierra Madre by a pass of rugged hills that rise to around 1,200 to 1,600 meters (INEGI, 1998).

El Imparcial publishes videos and articles on recent Madrean Discovery Expedition to Sierra El Tigre

The Vegetation and Flora of the Region of the Rio de Bavispe (Stephen S. White, 1948)

Vegetation and Flora research from 1938 to 1941 in the Rio Bavispe / Sierra El Tigre region. At that time White said that the area "...certainly is one of the least known regions of the North Mexican border" and "has been almost completely neglected by scientists". This is no longer entirely true about northeastern Sonora, but there are still large gaps in knowledge in the region.

From the Introduction:

Trip Report - Sierra El Tigre, Sonora, Mexico

The goal in traveling to the Sierra El Tigre - one of the most extensive of the sky islands - was to complete a basic bio-geographical assessment of the area, listing species of flora and fauna present in the Sierra El Tigre and especially “Fracción Número III Sierra El Tigre” property of Francisco Tarazón, located within the limits of the Ajos-Bavispe Reserve. We also sought to determine the extent of past and present human disturbance and impact as well as the extent of wilderness character in the range.

Subscribe to RSS - El Tigre