The mission becomes available after completing Chapter 2 in the RDR2 Story Mode.
All That Giltters (Treasure Hunting) Mission Walkthrough
Jack Hall Gang Treasure Map 1
To begin this assignment you first need to speak to Máximo Cristóbal Valdespino, a stranger looking through binoculars found a short distance to the west of Flatneck Station. He is is a self-proclaimed famous explorer.
He will offer to sell you a treasure map of the location where Jack Hall Gang's gold is stashed, asking for $10. If you decline, he will lower his price to $5. You can always rob him instead if you prefer, though this will cost you a little honor.
If you fail to retrieve the map from Maximo (for example by killing him and not looting his body), you will be able to purchase it from a fence.
Jack Hall Gang Treasure Map 2
If you open your satchel and consult the first Map, you might recognize Caliban's Seat, just north of Horseshoe Overlook. From the top of the cliff you can traverse narrow ledges to reach a crack in the wall, inside which the second map awaits.
Jack Hall Gang Treasure Map 3
The second Jack Hall Gang map leads you to Cotorra Springs, directly west of Bacchus Bridge. The third map is hidden in one of the piles of rocks close to the geysers.
Jack Hall Gang Treasure
The third map shows a location called O'Creagh's Run, far to the north of Emerald Station, in the Grizzlies East. Swim to the small island in the middle of the lake and inspect the bushes to find the Jack Hall Gang treasure hidden under a rock, and obtain 2 Gold Bars in the process.
All That Giltters (Treasure Hunting): Mission Info
- Rewards 2 Gold Bars (each worth $500.00)
- Notes This Stranger quest begins the Treasure Hunt activity for Jack Hall Gang treasure.