Common high destinations: Denver (5,280 ft), Mexico City (7,350 ft), Cusco (11,150 ft), Everest Base Camp (17,600 ft), La Paz (11,975 ft), Lhasa (11,975 ft)
Feet
Your current elevation before ascending (typically sea level = 0).
How many days you plan to take to reach the destination elevation. More days = lower risk.