Sendero Poza Azul de San José

The trail to Poza Azul de San José begins in the ejido of San José, inside the Reserva de la Biosfera El Cielo biosphere reserve near Gómez Farías, in the state of Tamaulipas, Mexico. Access requires a 4x4 or high-clearance vehicle to cover the rough approach road from Gómez Farías to the ejido, typically arranged through a local guide since the route crosses community land and is not signposted for independent visitors. From the vehicle drop-off point, the walking portion covers approximately 3 km round trip, with a gentle net descent of about 80 m through tropical semi-deciduous forest toward the pool. The path is unpaved dirt and packed earth, occasionally rocky and slick near stream crossings, with light-to-moderate shade from the forest canopy for most of the route; there is no technical climbing or exposure to cliffs. Along the way, hikers pass through stands of native hardwoods and cross a seasonal stream before the forest opens onto the turquoise pool itself, fed by a spring that keeps the water clear and cool year-round. The pool serves as the natural destination and turn-around point; there are no huts or refuges along the route, and no potable water sources beyond the stream, so hikers should carry all the water they need. The final approach to the pool includes a short, slightly steeper stretch of wet rock that requires careful footing. Cell phone signal is unreliable for most of the corridor, so hikers should coordinate pick-up times with the guide in advance. Because the reserve protects sensitive habitat, camping and swimming outside designated areas are discouraged, and visitors are expected to pack out all trash.