( CNN ) -- A Texas man died after falling off the South Rim of the Grand Canyon . John N. Anderson of Grapevine was visiting the national park with family on Saturday morning when he fell about 350 feet near the El Tovar Lodge , officials said . Park rangers were unable to resuscitate him . Anderson was with his wife on an outing but was alone when the accident occurred , according to the Fort Worth Star-Telegram . `` He was n't trying to shoot a photograph or anything like that , '' his sister-in-law , Suzy Naughalty , told the newspaper on Tuesday . `` It was just a freakish accident . '' Anderson , 53 , was married with two sons and a daughter . The National Park Service and the Coconino County , Arizona , medical examiner were investigating the incident . Nearly 5 million people visit the Grand Canyon each year . Rangers respond to some 1,300 medical incidents and 300 search and rescue missions annually , according to park statistics . Swimmer swept over Yosemite waterfall . Minnesota hiker falls to his death near Yosemite waterfall . CNN 's Dana Ford and Tina Burnside contributed to this report .
NEW : `` It was just a freakish accident , '' sister-in-law says . NEW : John N. Anderson , 53 , falls about 350 feet off the South Rim . He was visiting with his family from Texas . The National Park Service and a medical examiner are investigating .