Udzungwa is largest and most biodiversity of a chain of a dozen large forest swathed mountains that rise majestically from the flat coastal scrub of eastern Tanzania covering the Mwanihana Forest Reserve in the Morogoro Region and the West Kilombero Scarp Forest Reserve in the Iringa Region.

The Udzungwa Forest which forms part of the Park, many rare plants have been identified, not found anywhere else in the world. Not a conventional game viewing destination, Udzungwa is a magnet for hikers. An excellent network for forest trails includes the popular half day ramble to Sanje waterfalls, which plunges 170 meters (550 feet) through a misty spray into the forested valley below.

The more challenging two night Mwanihana trail leads to the high plateau, with its panoramic views over surrounding sugar plantation before ascending to Mwanihana peak, the second highest point in the range.