Form 8 stacks of 3 ruin tiles and place on board.
Randomly choose 4 large, 4 medium and 4 small temple tiles of each color to build 12 temples and place on board.
All small purple temple tiles get flipped over, face up.
For 2 players: discard all small temple tiles.
Place a toolbox token, color side up, on each river trail.
Each player takes (of a single color):
Explorer miniature and place at base camp.
Explorer playmat.
3 toolboxes, placing 1 at the bottom of the playmat and the rest on the top left corner.
10 pathways.
3 ration packs, placing them on the top right corner.
2 more ration packs, placing them at base camp.