High Altitude

{
  "name": "High Altitude",
  "page": 69,
  "__prop": "hazard",
  "source": "XDMG",
  "entries": [
    "Traveling at altitudes of 10,000 feet or higher above sea level is taxing for most creatures because of the reduced amount of oxygen in the air. Each hour such a creature spends traveling at high altitude counts as 2 hours for the purpose of determining how long that creature can travel (see \"{@book Travel Pace|XDMG|1|Travel Pace}\" in {@book chapter 2|XDMG|1}).",
    "Creatures can become acclimated to a high altitude by spending 30 days or more at this elevation. Creatures can't become acclimated to elevations above 20,000 feet unless they are native to such environments."
  ],
  "trapHazType": "ENV"
}