Details about exploring the Grand Canyon:

1. Land Scape:

1.1. The author of Boulders Taller Than the Great Tower describes the landscape to be more difficult than they first thought. " as they could not reach the bottom because of the many obstacles they met, for what from the top seemed easy, was not so, on the contrary, it was rough and difficult." As for the terrain, "This region was high and covered with low and twisted pine trees; [...]"

2. Size of canyon:

2.1. The author of Boulders Taller Than the Great Tower describes the size of the canyon to be large, and looked massive even from one side to the other. " Accordingly when they had marched for twenty days they came to gorges of the river, from the edge of which it looked as if the opposite side must have been more than three or four leagues  away by air. " (1 leagues is approximately 3 miles).

3. Temperature:

3.1. The author of Boulders Taller Than the Great Tower describes the temperature to be cold even in the warm season. " it was extremely cold, being open to the north, so that, although this was the warm season, no one could live in this canyon because of the cold."

4. Water:

4.1. The author of Boulder Taller Than the Great Tower describes the water to be originally not too large but after sending three men 1/3 of the way down they found it to be much larger than they previously thought. "The men spent three days looking for a way down to the river; from the top it looked as if the water were a fathom across (six feet across)." " They returned about four o’clock in the afternoon, as they could not reach the bottom because of the many obstacles they met, for what from the top seemed easy, was not so, on the contrary, it was rough and difficult. They said that they had gone down one-third of the distance and that, from the point they had reached, the river seemed very large, and that, from what they saw, the width given by the Indians was correct." The Indians had previously said that the river was 1/2 a league wide.