is main path to look at a lake or a good vista and twisted an ankle or a knee, or possibly tripped on a root. 

Berg's photo has been posted at every campsite on the island, and each hiker is being given a photo to assist in the search.

More search and rescue teams are expected to arrive at Rock Harbor on Thursday.

 We're hoping to get some good news today,  Paul said.

 It's a helpless feeling for us - for the whole family,  Kim said.

Anyone who may have seen Berg or has information about his whereabouts is asked to contact Isle Royale National Park Service at 906-482-0984.