Only experienced and properly equipped skiers should attempt this trip. The ranger on duty will inform you of the current weather forecast, avalanche hazards, and parking information. You will need to provide a detailed itinerary, list of supplies, and emergency contact information. Hazards and Logistics Winter can be a hazardous time in the backcountry. Be prepared for any type of weather, including blizzards with white-out conditions which may require you to extend your trip.
Snow avalanches are also a danger in many places.
The National Park Service recommends that you carry snow shovels, probe poles, and avalanche cords or beacons if you plan to circle the lake or travel in other areas with high avalanche danger. Blowing snow regularly forms fragile cornices along the edge of the caldera. Stay well back from the edge to avoid breaking through. None of Crater Lake National Park's ski trails are groomed, and route-finding in the backcountry is often difficult. Bring a detailed topographic map and compass, and know how to use them.