You walk in the direction she indicated until you come to a nice sturdy bridge. You cross it as easily as finding a good loan with an 800 point credit score.
As you get off the bridge, you notice a skull-shaped rock to your right.
Your uncle told you about this rock! You're almost at the cave where he hid the gold.
Suddenly from behind the rock, the Bog Witch reappears.
"You won't get away this time," she yells, charging towards you with a solid looking tree branch.