article_snippet: (CNN)One person died and another was severely injured after a cliff collapsed on the Pacific Coast north of San Francisco, the National Park Service said.
article_snippet: The day before the collapse, Point Reyes National Seashore had posted a photo on Facebook of a fissure in the rock structure -- with a warning to use caution.
article_snippet: Visitors using Bear Valley Trail to Arch Rock -- watch out!
article_snippet: At the very end of Bear Valley Trail, cliff is breaking away -- seen here in a photo taken Wednesday," the government organization said.
article_snippet: The NPS said hazardous conditions had been reported to The NPS on March 19.
article_snippet: John Dell'Osso from Point Reyes National Seashore told CNN that John Dell'Osso from the Point Reyes National Seashore had posted warnings after being notified last Thursday that a crack had formed in the arch.
article_snippet: "CNN posted all kinds of notices up and down that particular trail, which is how probably how 99% of the people who would hike that far would (go), and all around CNN visitors' center in Trail Heads, just to warn people of the hazard that was out there," John Dell'Osso from the Point Reyes National Seashore said.
article_snippet: CNN didn't know what could happen and what unfortunately did happen is on Saturday afternoon a large portion of that overlook actually collapsed down onto the beach and partly onto the ocean," John Dell'Osso from the Point Reyes National Seashore said.
article_snippet: the Marin County Sheriff's Office said the Marin County Sheriff's Office had been hiking about 6:30 p.m. Saturday "when a structural collapse of the rock occurred.
article_snippet: Bluffs along the California coast are known for being unstable, according to The National Park Service.
article_snippet: The Arch Rock trail that runs along that part of the California coast has been closed until further notice.
article_snippet: CNN's Joe Sutton contributed to this report.
highlights_snippet: Officials had posted warning Friday that cliff was dangerous .
  