In Nancy Drew: The Secret of Shadow Ranch, Nancy must find 10 arrowheads for Mary Yazzie. In return, she’ll give you the tuning forks you need for Dirk’s clue. Here’s where you can find all ten:
At the Ranch = in the pumphouse.
Dry Creek = one by the barrel at gallows, one at outhouse (avoid the scorpion by leaving and coming back).
Trail Stop = One across from Bob, three more as you step forward.
Cougar Bend = one up above on the ledge, one in front of the center wall, one just before the stone ramp on the left.