We traded Utah’s reds and oranges for Colorado’s blues and greens, setting out on a long hike to reach a series of glittering emerald lakes on our first full day in the Centennial State. It was a clear day but the wind was howling and the entire canopy was shaking. There were trees down along the trail with roots showing signs of fresh falls. I came to a rushing creek and met a young guy with a fishing rod sticking out of his pack. He was helping an older couple make the crossing, and mentioned that he’d heard some trees falling in the distance. We hiked together and listened for signs of danger.