Yosemite:

1: Near the beginning of Beginner's Luck

2: Under a waterfall

3: In the snowy mountain region

Moab:

1: Near a tunnel in Fork in the Road

2: Near a "stonehenge" formation of rocks

3: On top of a inclined turn in Dead Man's Curve

Hawaii:

1: Under the bridge in Stampede

2: Near the tall grass in No Holds Barred

3: Right next to the road, turn into the ditch