"We don't have a lot of information right now, but his last known location was in the developed area of the South Rim, which is pretty large," she said.
For perspective, Shedlowski said a developed trail that runs along the South Rim is 14 miles long, "just along the rim. That flat trail is just one tiny portion."
Shedlowski said the park service currently is conducting a search and rescue operation for Kramer. She added that a missing persons investigation also is ongoing.
She asked that anyone who has information on Kramers whereabouts contact the park services Silent Witness Line at 928-638-7840.
Shedlowski said Kramers family is in Arizona, working with liaisons on the search team.
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