Big Horn River

The Big Horn River was a river that ran through the Longhorn Valley in the Military Wilderness Training Preserve on Reach in the Epsilon Eridani system.

The Spartan-IIs used the river for training exercises, as they knew the terrain well and could navigate it easily. During the Battle of Reach, a Covenant invasion force of more than ten thousand ground troops, supported by a Covenant cruiser hovering overhead, landed, and set up camp, near the Big Horn River. A section of the Big Horn River was evaporated during the Battle of Reach, when Spartans Fred-104, Kelly-087, and Joshua-029 destroyed the invasion force and the Cruiser using a Fury Tactical Nuclear Weapon.

List of appearances

 * Halo: The Fall of Reach
 * Halo: First Strike
 * Halo: Reach
 * Halo: Fall of Reach
 * Boot Camp
 * Invasion