Great hike to the Rim Overlook and Navajo Knobs; about 10 miles round trip. It was hot and exposed the whole way, but took about 4 hours to complete that hike. Cassidy arch was about 4 miles round trip and took only 90 mins to complete. It was perfect to go around 5pm since the canyon shielded you from the sun and it was a refreshing temperature at that time.