The woman who fell 70 foot to her death when a San Francisco beauty spot collapsed into the sea on Saturday has been named as 58-year-old Nancy Blum . Authorites said on Monday that Blum , together with an unnamed companion , had been hiking about 6:30 p.m. ‘ when a structural collapse of the rock occurred ’ at Point Reyes National Seashore . After emergency personnel reached Blum and her companion , she was flown to Bear Valley Ranger Station , where she was pronounced dead . Nancy Blum , 58 , of San Francisco died on Saturday after falling 70 foot to her death when the Arch Rock at Point Reyes National Seashore collapsed into the sea . Authorites said on Monday that Blum , together with an unnamed companion , had been hiking about 6:30 p.m. on Saturday ‘ when a structural collapse of the rock occurred ’ at Point Reyes National Seashore . The National Park Service and the county coroner 's office are investigating the cause of Blum 's death , reports SFGate . 'The cause of death will be pending the completion of toxicology studies , ' the sheriff 's office said in a statement . Blum ’ s hiking companion continues to be treated for life-threatening injuries . The two visitors were standing on the Arch Rock lookout point when the bluff gave way and the pair fell about 70 feet , winding up covered with rocks and debris . The National Park Service had posted signs at the site on Thursday warning hikers that a fissure along the top of Arch Rock may have weakened the cliff and that walking along the edge was potentially dangerous . The park did not close the trail and in spite of the warnings , one hiker who visited the park told the San Francisco Chronicle that she had seen dozens of people walking in the area . A Sonoma County Sheriff officer pilots his helicopter near the collapsed section of the Arch Rock overlook at the Point Reyes National Seashore , about 40 miles northwest of San Francisco . Bluffs along the California coast are known for being unstable , according to the park service . The Arch Rock trail that runs along that part of the coast has been closed until further notice . This bluff along a hiking trail in Point Reyes National Seashore in Marin County crumbled away on Saturday evening . One hiker fell 70 feet to their death while another had to be airlifted to the hospital . 'It was clear no one should be on that rock with the huge fissure , ' Karen Blasing said . 'We stayed back , but many others were unconcerned and dangerously taking chances . ' KBCW reports that other park-goers scrambled to assist Blum and her companion before officials from Marin County fire , sheriff , and Park Rangers arrived . A Sonoma County Sheriff ’ s Office carried the pair to the trailhead , where a medical chopper was waiting . Bluffs along the California coast are known for being unstable , according to the park service . The Arch Rock trail that runs along that part of the coast has been closed until further notice . Dangerous terrain : The National Park Service had put up signs on Thursday that warned about a fissure , seen in this undated photo , along the top of Arch Rock that could have weakened the cliff . Fallen : The two hikers fell 70 feet when the bluff gave way , killing one visitor and requiring an airlift for the severely injured hiker .
Nancy Blum , 58 , of San Francisco died on Saturday after falling 70 foot to her death . A bluff along a hiking trail in Point Reyes National Seashore , had crumbled away on Saturday about 6:30 p.m. . Blum 's unnamed companion remains in hospital with life-threatening injuries . The National Park Service had warned visitors two days before about a fissure that had opened up on Arch Rock , possibly weakening the cliff .