Updated

Six months after actress Natasha Richardson died following a fall at the Mount Tremblant ski resort in Quebec, the company that operates the facility has announced helmet requirements at its North American resorts.

Vancouver-based Intrawest said Thursday it will recommend all skiers and snowboarders wear helmets when the ski season begins in a few weeks.

Richardson, the 45-year-old wife of actor Liam Neeson, died in March after falling during a skiing lesson and suffering a head injury at Mount Tremblant.

Intrawest operates nine ski resorts including Winter Park, Copper Mountain, and Steamboat Ski & Resort in Colorado; Stratton in Vermont; Snowshoe Mountain in West Virginia; Mountain Creek in New Jersey; Mount Tremblant in Quebec; Panorama Mountain near Invermere, British Columbia; and Whistler Blackcomb, which will host alpine events for the 2010 Winter Games.