Whether you are on or off trail in the park during the winter, you are in a wilderness area. Anyone venturing into the backcountry does so at their own risk. Visitors should be well prepared, equipped and informed before entering the backcountry. The winter climate can be severe and unforgiving with weather conditions changing quickly. Heavy snow and poor weather will significantly increase the difficulty of skiing and snowshoeing. Cellular phone coverage is minimal in the park, do not rely on a phone for emergency or communication purposes!
Winter backcountry travel hazards exist, including avalanches and potentially unsafe ice and snow layers on Callaghan Lake. Visitors must be familiar with recognition and avoidance of avalanche terrain and conditions and with conditions on the lake. Backcountry visitors should be appropriately equipped with avalanche transceivers, probes, snow shovels, first aid kits, and have adequate knowledge of avalanche assessment skills and avalanche rescue procedures.
There are no garbage facilities, so always pack out what you pack in!
The pit toilet at the summer campsite is user maintained in winter and may be largely buried by snow.
The snowmobile corridor through the park was closed in 2009, to be consistent with the broader non-motorize management direction in the Upper Callaghan Valley. The Ministry of Tourism, Culture and the Arts issued a Recreation Order closing the upper Callaghan Valley to motorized use. This recreation order will be in effect from November 1 to May 15 of each year hereafter. Callaghan Lake Park is open to non-motorized use only during this period.
Callaghan country wilderness adventures operates a commercial cross-country ski operation which includes 4km of groomed trails within the park (of the total 38km in its operating area), and a mountain cabin backcountry lodge west of the park in the adjacent Callaghan Conservancy. The operator also may offer a shuttle service for skiers to Callaghan Lake in winter.
Both Callaghan Country Wilderness Adventures and Whistler Olympic Park offer an extensive, marked, snowshoe trail system (trail use fees in effect).