Bosque de Negro
From Halopedia, the Halo wiki
"Bosque de Negro", Spanish for Black Forest, is a location in or near Ankara, Mare Imbrium on Earth's moon, Luna. It is used as an Imbrium Machine Complex testing site, where the IMC's MJOLNIR/Pathfinder variant was first field-tested. It has been noted as being infamous for its very inhospitable and harsh outland conditions.
- Halo Waypoint: Halo 4 Interactive Guide (Pathfinder armor description)