Fort Irwin is a United States Army training center located in California's Mojave Desert. The climate in this region is characterized by long, hot summers and mild winters. The area is arid and receives little rainfall, which contributes to high evaporation rates and dry conditions. The hydrology constituents of the area include several natural springs and small streams, as well as man-made reservoirs and water treatment systems. Outdoor recreation opportunities include hiking, camping, rock climbing, and off-road vehicle activities. The nearby Mojave National Preserve provides additional opportunities for outdoor exploration and adventure.