One person is dead and another being treated for life-threatening injuries after a bluff at the end of a popular hiking trail at Point Reyes National Seashore collapsed . The two visitors were standing on the Arch Rock lookout point just before 6 p.m. on Saturday when the bluff gave way and the pair fell about 70 feet , winding up covered with rocks and debris . Collapse : A bluff collapsed at Point Reyes National Seashore in Marin County , killing one hiker and leaving a second with life-threatening injuries . The National Park Service had posted signs at the site two days earlier warning hikers that a fissure along the top of Arch Rock may have weakened the cliff and that walking along the edge was dangerous . The park did not close the trail and in spite of the warnings , one hiker who visited the park that day told the San Francisco Chronicle she had seen dozens of people walking in the area that day . '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 before officials from Marin County fire , sheriff , and Park Rangers arrived to rescue the pair . A Sonoma County Sheriff ’ s Office carried the pair to the trailhead , where a medical chopper was waiting . One of the hikers was pronounced dead at the scene . The other was airlifted to a hospital . They have not been identified . After the fall , the trail was closed entirely , with the National Park Service posted a message to their website . 'The area leading up to Arch Rock is closed for your safety , ' the message read . 'The land may still be unstable and further collapse or erosion could occur . ' Dangerous terrain : The National Park Service put up signs days earlier 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 .
A bluff along a hiking trail in Point Reyes National Seashore in Marin County crumbled away Saturday evening . One hiker fell 70 feet to their death while another had to be airlifted to the hospital . The National Park Service had warned visitors about a fissure that had opened up on Arch Rock , possibly weakening the cliff . The two hikers have not been identified . Photo: NPS /