Big Horn River

The river during the Fall of Reach.

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 (First appearance)
• Halo: First Strike (Mentioned only)
• Halo: Reach
• Halo: Fall of Reach
  • Boot Camp
  • Invasion
• Halo: The Fall of Reach - The Animated Series
• Halo: Shadows of Reach (Mentioned only)