From Halopedia, the Halo wiki
Battle Canyon is a multiplayer map included in Halo: Combat Evolved Anniversary and the Anniversary Map Pack for Halo Reach. It is a remake of Halo: Combat Evolved's Battle Creek and Halo 2's Beaver Creek. A forge variant with similar title to the Halo 2 version is also available for those who prefer the classic multiplayer map.
The map is set on a Halo ring, within a rocky canyon housing two Forerunner telemetry spire structures which serve as the bases. The spires are key components of the ring's translocation grid. The rocky warrens of this part of Halo provide the ideal environment for an array of impressive telemetry clusters. These spires’ synchronization conduits ensure that the ring’s translocation grid is always fully operational, part of a remarkably powerful system which allows near-instant transportation across the full ten thousand kilometers that span the installation.
The following are locations on the map that are so named on the player's heads-up display during gameplay: