Due to constant fog and cloud cover, temperature may decrease significantly at night compared to the lowlands, and the orographic influence of the Northern Range produces rainfall in the region that is the highest in the country, possibly exceeding 3500 mm per year.

El Cerro del Aripo is home to the golden treefrog, only found in the highest peaks in Trinidad and the Paria Peninsula, Venezuela .

The constant cloud/fog cover and lower temperatures associated with the region's high elevation and that support Cloud Forest or Elfin Woodland are also factors important to the survival of the elusive frog.

Also restricted to the relatively cooler and wetter tropical cloud and montane forests of Cerro del Aripo and other higher reaches of the Northern Range is the endemic so-called Luminous Lizard Riama shrevei.

El Cerro del Aripo is accessible for hikers, and is located near the world-famous Asa Wright Nature Centre.