She was thrown by her horse , which then collapsed upon her .
Though considered an expert horsewoman , Mead was killed on her 61st birthday in an accident while working cattle on leased land in Grand Teton National Park near the Mead Ranch in Spring Gulch .
expert horsewoman was thrown by expert horsewoman 's horse , which then collapsed upon her .
Though considered an expert horsewoman , Mead was killed on her 61st birthday in an accident while working cattle on leased land in Grand Teton National Park near the Mead Ranch in Spring Gulch .