1. Check Road Conditions
Use CalTrans QuickMaps Check road conditions and chain requirements before traveling to Big Bear Lake or any other mountain regions. Poor road conditions can exist in any season; be sure you're prepared. Tire chains must be carried in your vehicle from November 1 until April 30.
2. Check local weather conditions
Know what weather to expect in mountain regions. Sunny weather at your house does not mean sunny weather in Big Bear.
3. Know where you're going
Have your route planned out before you start traveling. Check for road closures or poor road conditions so you don't need to reroute.
4. Plan your return trip home...
...not just your arrival route.