I'm planning to take a trip to ride around the San Juan Mountains in Colorado and I thought I read something about how the Mavic won't even take off if ground level is 8000+ feet above sea level? For example, the top of Imogene Pass is 13,114 feet high. Could I launch the Mavic from there? Is there a special firmware or something? Being in low and flat Texas, I have no way to test this.