Dozens of firefighters helped by volunteers and water bombing by helicopters are continuing to tackle hotspots.
It is hoped that cooler weather and rain will help prevent a further spread of flames.
Smith said the impact on the landscape was “heartbreaking”.
“It is a really sad sight,” he added.
“You are used to these beautiful mountains all summer and seeing them covered in snow in winter.
“To see the fires getting up to where people ski you really wouldn’t have thought that was possible.”
Smith praised local communities for supporting firefighters, farmers and other volunteers.