Jack Dykinga / Rainbow over Long Canyon with fall coloured Cottonwood (Populus) trees against canyon walls, Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA, October 2018.

Jack Dykinga / Waterfall over sandstone with cottonwood tree, Long Canyon , Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA. October.

Tim Fitzharris / Conifers and Lower Yellowstone Falls, Yellowstone River, Grand Canyon of Yellowstone, Yellowstone National Park, Wyoming

Jack Dykinga / Toroweap Overlook in sunrise light illuminating rim rocks with Colorado River far below, Grand Canyon National Park, Arizona, USA.

Jack Dykinga / Toroweap Overlook in sunset light illuminating rim rocks with Colorado River far below. Grand Canyon National Park, Arizona, USA.

Jeff Foott / Waterfall and river in canyon, Calf Creek Falls, Grand Staircase-Escalante National Monument, Utah

Jack Dykinga / Agave (Agave utahensis) close up of spines with Pinyon pine cone (Pinus edulis) wedged amongst them. Grand Canyon-Parashant National Monument, Arizona, USA

Jack Dykinga / Banded Navajo Sandstone slot canyon in the Escalante Canyon complex. Grand Staircase-Escalante National Monument, Utah, USA.

Jack Dykinga / Indian paintbrush (Castilleja sp.) flowers amid boulders in a stream, in narrow canyon with conifers in background Grand Staircase-Escalante National Monument, Utah, USA.

Jack Dykinga / Cap-rocks on the rim of the Escalante Canyon at dawn. Grand Staircase-Escalante National Monument, Utah, USA, October 2012.

Jack Dykinga / Cottonwood (Populus fremontii) trees in autumn at sunset, forming a sinuous line of yellow trees. Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah, USA, October.

Jack Dykinga / Cottonwood (Populus fremontii) trees forming a sinuous line of yellow trees at sunset, in Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah, USA