NEW : Strikes happened on trails in the Ute Crossing Trail . NEW : A man died , 10 others injured Saturday . NEW : On Saturday , a woman from Denver was killed , three injured . Hikers urged to be aware when storm clouds gather , they should head to lower ground .
NEW : Strikes happened on trails in Rocky Mountain National Park . NEW : A man died , three others injured Saturday . NEW : On Friday , a woman from Ohio was killed , 10 injured . Hikers urged to be aware when storm clouds gather , they should head to lower ground .