has been used at:
- arches national park
- maple canyon
- we went through Redwood National Forest, but never had to show the pass ..
- lover's leap
- grand teton national park
- yellowstone national park
- devil's tower
- carlsbad caverns (this is an absolute MUST SEE!)
- white sands national park
- petrified forest national park
- sequoia national park
- grand canyon
- zion national park
- yosemite national park
