Snakes are typically associated with warm, lowland environments like forests, deserts, and wetlands, but some species have adapted to far more extreme conditions. In recent years, researchers have identified snakes living at elevations once thought too harsh for reptiles, where freezing temperatures, thin air, and limited food sources create a challenging environment for survival. In this A-Z Animals slideshow, we explore a venomous snake species found at elevations approaching 16,000 feet.