Majestic Sierra Madre Oriental stretches more than 1000 kilometers from the border with USA to northern Puebla in central Mexico. West of this range is the huge Chihuahua desert in its northern part, east are the Mexico's Gulf coast plains. Sierra Madre Oriental is famous for its rich biodiversity. Large pine-oak forests are found up to the highest mountains with more than 3700 meters sea-level. Limestone dominate its geology. Huge caves, sharp pinnacles and steep walls are common. Nearly in its center is the metropolis Monterrey, which is with more than 4.5 million inhabitants the third biggest city of Mexico.
Its tallest peak La Viga or Cerro San Raphael (3716 meters sea-level) is covered sometimes by snow in winter. It can be climbed up by a strenuous hike of 5 hours from the saddle east of the little village Los Lirios. We were very lucky because it started snowing when we returned to our car.