Missing person Mark Peterson, last seen hiking near Star Lake in Northern Wisconsin wearing a green jacket and blue jeans.

We've been searching for my brother, Mark Peterson, who went missing while hiking near Star Lake in Northern WI last Saturday. He's 6 feet tall, has brown hair and blue eyes, and was last seen wearing a green jacket and blue jeans. If anyone has seen him or has any information, please contact me. We're extremely worried about him.