Mason was a great tour guide. I bus was a full group of 12 with a variety of ages and interests. Mason was full of details, let us oogle marmots and sheep, explained the foliage, drove carefully, had chill music and continuously offered water. He also explained odd experiences associated with high altitude. We had fun, saw beautiful sites, and went through opposing climates. I was glad I had long pants, and extra layer on top, and sturdy shoes.