Avalanche at Hawaiian tourist area kills six May 10, 1999 Share 1 -- HONOLULU -- At least six people were killed and more than 50 injured when boulders crashed into a pool below Sacred Falls State Park, a popular Oahu tourist spot. Rescue workers were to continue the search the morning after the May 9 accident, which left 13 hospitalized, four in critical condition.Sacred Falls, 30 miles from Honolulu in the Koolau Mountains, is reached by a three-mile trail. The tragedy occurred at the main pool, which was crowded with families, many of whom were swimming when boulders fell from a cliff aboved the 90-foot waterfall.Many of the dead and injured were believed to have tourists and military personnel. "This is a very sad day for Hawaii," said Gov. Ben Cayetano, who toured the site by helicopter. "Our hearts go out to the families of those killed and those injured." The park will remain closed indefinitely.