Canadian authorities have called off a six-day search for Denise Ann Williams, a 62-year-old Australian woman who went missing in late April while hiking alone in Cape Breton Highlands National Park (a vast protected wilderness of over 360 square miles in the province of Nova Scotia, eastern Canada). The Royal Canadian Mounted Police said the effort, which involved around 100 personnel, dogs, aircraft, and ground crews, was suspended after yielding no new information about her whereabouts; her rental car was found near the trailhead of the Acadian Trail, a rugged 8km loop known for steep cliffs, river canyons, and dense boreal forest. The case highlights the serious dangers posed by the park's challenging terrain, which is further complicated by fast-moving Atlantic fog and wildlife including black bears, moose, and coyotes.