2024 Grand Canyon Calendar! The Grand Canyon is 18 miles wide and 277 miles long. At its deepest, it reaches a depth of over a mile! Geologists estimate that it took 6 million years for the Colorado River to carve this behemoth into the land that is now Arizona. Take one look at these stunning images, and you will be left with no doubt that its size is matched by its beauty. Enjoy this beautiful destination wall calendar. HIGH QUALITY: 2024 Great Outdoors Calendar Size Closed: 12 x 12 Inch. Opened: 12 x 24 Inch. Does not bleed through! 13 Full Color Images in the 2024 National Parks calendar! All 2024 Scenic Travel Calendar photos are hand selected from a wide array of photographers featuring mountains, lakes, trees and nature a true hikers calendar. No compromises are made on image quality or content in our 2024 nature calendar.