Geothermal Valley - Tossing Gourds Challenge (Part 1)

After digging up the last survival cache in the upper village, as described in the main walkthrough, step into the nearby PUMPKIN PATCH, which was not accessible when you first visited this area. Pick a pumpkin.

Then move past the spot where you just dug up the survival cache. Look over the barrier made of fallen trees to spot a barrel with a wooden backstop. (It will glow in Survival Instinct view if you've unlocked the Eye for Detail skill.)

Hold LT/Right Mouse and use the right stick or mouse to aim at the open barrel. The angled backstop doensn't really allow you to bounce the gourd off of it but will help with targeting. If you move the white targeting circle up the front of the barrel...

...it disappears when it's directly over the barrel and then reappears if you keep moving the target up the backstop.

You want to hit that sweet spot where you can't see much, if any, of the white circle. When you've lined up the shot, press RT/Left Mouse to throw the pumpkin.

Like so.

A successful throw initiates the Tossing Gourds Challenge. To complete it, throw 4 more pumpkins into 4 more barrels, which are hidden around the village. These are shown in Part 2.