Originally Posted by Biped
The dunes look like Florence area and the desert is Steens area and Alvord flats. The rain forest looks like Tillamook forest in the wet season. Snow may be out of Bend somewhere.
Someone in here may know the exact locations.
No, not quite. Urban riding was Portland but unless Icon is lying for some unexplained reason, here are the locations listed on the intro frame for each of the "sections":
Rain Forest: Pantalian Mountains, Costa Rica
Desert: Alta Barbina, Brazil
Snow: Palatripos, Argentina