Fire in the Hole is a Prepper Stash in Far Cry 5. Prepper Stashes are mini-quests that offer exceptional rewards for completing.
Location
This stash is located at the Wellington Residence, south of Orville Creek in the southeast corner of Holland Valley.
Finding the Stash
The note can be found outside the house on a rock. Read the note, then go inside the building, back into a corner, and drop down into the mine through a hole in the floor. Keep going forward and break down the barrier. Turn right and follow a the path until a left turn can be taken. Kill the cultist and keep going. Pass through another wooden barrier and take out more cultists. Keep going through barriers and cultists till a large open area is reached. To get across the chasm, look to the left and destroy the rocks blocking the flow of water. After the water rises enough, swim across the chasm. Follow the path at on the other side to locate the stash.
Rewards
Cash, perk magazines and a Combat Satchel Upgrade.