Castle Mountains National Monument
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Castle Mountains at a glance
- Best time
- March–May, October–November
- Trip length
- Half day–1 day
- Don't miss
- Main Castle Mountains highlights — see Things to Do for current listings
- Nearby city
- Barstow, CA
Explore this park
About Castle Mountains National Monument
Castle Mountains represents some of the most unique elements of the Mojave Desert. Nestled between the Nevada state line and Mojave National Preserve, the nearly 21,000 acres of Castle Mountains boasts Joshua tree forests, unbroken natural landscapes, rare desert grasslands, and rich human history. This intriguing area provides serenity and solitude from nearby metropolitan areas.
2 current NPS alerts
- Information: No Hunting Allowed in Castle Mountains National Monument
- Caution: Most Monument Roads Require Heavy Duty 4WD Vehicle to Travel Safely
Source: National Park Service (as of Nov 11, 2026). Official Castle Mountains National Monument page on nps.gov
Weather Information
Weather at Castle Mountains changes with the seasons. Freezing temperatures are expected in winter, with occasional snow.
- Spring
brings mild warm days and cooler nights.
- Summer
months are much hotter, with temperatures nearing 100 degrees Fahrenheit.
- Fall
is a cooler respite after the heat of summer.
With enough rain, wildflowers can carpet the area, making for spectacular displays. Strong monsoonal storms in late summer may cause flash-flooding in low-lying areas and can create hazardous road conditions.
Operating Hours
Castle Mountains National Monument is open year-round. There are no facilities in the Monument. Visitor Centers in neighboring Mojave National Preserve provide information and orientation.
- MondayAll Day
- TuesdayAll Day
- WednesdayAll Day
- ThursdayAll Day
- FridayAll Day
- SaturdayAll Day
- SundayAll Day
Common questions
Planning Castle Mountains National Monument
The summary above covers timing and highlights. These go deeper on reservations, crowds, and logistics — check Alerts for live updates.
Reservation rules vary by season and activity for Castle Mountains. See Overview on this page for fees, timed entry, and campground details before you travel.
