Waimea Canyon, also known as the Grand Canyon of the Pacific, is a large canyon, approximately ten miles long and up to 3,000 feet deep.
Online and even at the site people were comparing it to the Grand Canyon and several said it was bigger/better. While very pretty especially with the green and red the Grand Canyon is 20 times longer and 2 times deeper and 25 times wider.
As Arizonians, we can assure you the Grand Canyon is much more spectacular.