The Mujica Nava Ecological Station (ESEC) is in the municipality of Porto Velho, Rondônia, and was created with an area of 18,280.85 hectares (45,173.0 acres).

It adjoins the border with the state of Amazonas and the Serra dos Três Irmãos Ecological Station.

It has similar fauna and flora to the neighboring Serra dos Três Irmãos ESEC.

[1] Some of the Rio Vermelho State Forest was included in the Mujica Nava Ecological Station.

[3] It is classed as IUCN protected area category Ia (strict nature reserve).