We urge you to be cautious while driving on forest roads during the winter. Unpaved roads that are open during the winter, such as 2N09 (Polique Canyon Road), are not maintained. You should have a high-clearance 4x4 vehicle, chains, shovel, sand, cell phone (will not work in all areas), and emergency supplies. Check the weather forecast and call the local ranger station to inquire on conditions before your trip. Do not travel alone and be sure to leave your itinerary with someone you trust. Even with these precautions you can still get stuck, and if help can make it to your location, it will be very expensive to get your vehicle out.
For State Highway information contact CalTrans 1-800-427-ROAD (7623) or http://www.dot.ca.gov
State Law: four-wheel and all-wheel drive vehicles must carry traction devices in mountain areas during winter months