Hikers and climbers should be prepared for high heat and humidity in Joshua Tree National Park and must use extreme caution. All hikes should be planned to begin at or before sunrise and end by 10:00 AM or planned to not begin until after 4:00 PM. Hiking in the middle of the day is not recommended. Summer temperatures on exposed parts of park trails can reach over 120° F (49° C) in the shade. Hiking in extreme heat can lead to serious health risks including heat exhaustion, heat stroke, hyponatremia, and death.
For more information on safe summer hiking, go to:
