The deaths of two women discovered just a week apart on Mount Tamalpais in April were unrelated and accidental, Marin County investigators and coroners announced on Tuesday. Magdalena Glinkowski, a 33-year-old Menlo Park woman who worked as a software developer, was found on April 12, two weeks after she was declared missing. Coroners said she died from environmental exposure and hypothermia over a period of one or more days, and displayed no signs of traumatic injury. “No sprains, no broken bones, nothing to indicate struggle,” said Lt. Keith Boyd of the Marin County Sheriff’s Office. She was unfamiliar with the area and not prepared for a prolonged or individual hike, investigators wrote. After an extensive search that employed search dogs and volunteers, her body was found about a mile from her car, parked at the Bootjack Trailhead, at the bottom of a creek bed below a steep slope. A week after her discovery, on April 17, the body of Mill Valley resident Marie Sanner, 50, was found just hours after she was reported missing following a nighttime hike with her dog, a German shepherd named Fiona, and a friend. In their forensic exam of Ms. Sanner, coroners found a level of blood alcohol concentration just beyond the legal limit. She died of a blunt injury to the head, likely after falling down a ravine into Fern Creek, below the Matt Davis Trail. Investigators also noted her lack of familiarity with the trail and the absence of both ambient light and lighting devices as factors in her death. According to her obituary in the San Francisco Chronicle, Ms. Sanner had lived in Mill Valley since 1966 and had relatives living in Woodacre; she worked as an elementary school teacher in Oakland and was an artist, a flamenco dancer, a tennis player, a painter and an avid hiker.