Hidden Mickeys - Disneyland - Frontierland

Non Attraction Specific

Golden Horseshoe

Under the stage check the center vent as one of the holes forms a Mickey.

Rivers of America

While riding the Mark Twain or Columbia keep an eye out for some rocks along the river that form a Mickey. They are on the island side of the river.

Tom Sawyer Island

If you look from above, the front building on the island has a Mickey on top of the chimney.
 

Big Thunder Mountain Railroad

Gears

At the very bottom of the big hill look to the left on the ground. Hidden upside-down in the gears is a giant Mickey.