The Jack Hall Gang maps from Red Dead Redemption 2 are a time-consuming sidequest, and it may lead some to question if they’re worth the effort. The Jack Hall Gang maps in RDR2 provide Arthur Morgan with a treasure hunt, with each map leading to the next until the end, where the true treasure lies. While following a series of hidden maps may sound like tedious work, if the player is up for exploring all of New Hannover and Lemoyne, starting with the first Jack Hall Gang map and slowly working through the rest may provide a nice detour from RDR2‘s main story.
https://screenrant.com/red-dead-redemption-2-jack-hall-gang-maps/