Helicopters flew over the Rocky Mountains on Thursday as officials prepare for a “concentrated ground search” for a hiker who has been missing for over a week, the National Park Service said.

Click here for the latest update on this story. A 23-year-old hiker went missing in Rocky Mountain National Park Sunday after he texted his friend that he had reached the summit of a mountain.

Nature Conservancy of Canada says habitat is declining in the region, which is home to over 70 at-risk species Another piece of the puzzle for ... slopes of the Rocky Mountains.