Image 1 of 2 Image 2 of 2 Coconino National Forest - Watercolor Painting from $18.00 Plein air painting of the Coconino National Forest just outside of Flagstaff, Arizona. Size: Select Size 5x7 inches 8x10 inches 11x14 inches 16x20 inches Quantity: Add To Cart Added! Plein air painting of the Coconino National Forest just outside of Flagstaff, Arizona.