 Santa Elena Canyon west from Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 Sunset from SW3 (Southwest Rim) campsite. Big Bend National Park, November 28, 2009
 Group of peole with Dallas Sierra Club watching sunset from SW3 (Southwest Rim) campsite. Big Bend National Park, November 28, 2009
 Emory Peak from lower section of Southwest Rim Trail. Big Bend National Park, November 28, 2009
 - a railroad near Santa Fe (New Mexico mountains - Dallas, September 1 - 6, 1997)
 Agaves on South Rim at sunrise. Big Bend National Park, November 29, 2009
 Upper part of Boot Canyon. Big Bend National Park, November 27, 2009
 Fall colors of Boot Canyon. Big Bend National Park, November 27, 2009
 Upper section of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Upper part of Boot Canyon Trail. Big Bend National Park, November 27, 2009
 Boot Canyon Trail ending at Southeast Rim. Big Bend National Park, November 27, 2009
 Elephant Tusk Mountain from South Rim at sunrise. Big Bend National Park, November 29, 2009
 Slopes of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 Slopes of Chisos Mountains from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Fall colors of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 Sandy washes of Blue Creek Canyon near Homer Wilson Ranch. Big Bend National Park, November 29, 2009
 Slopes of Chisos Mountains east from Boot Spring Trail. Big Bend National Park, November 27, 2009
 Eroded pinnacles of pink volcanic tuff looking like a miniature Bryce Canyon on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Fresno Circle campsite near Dodson Trail at evening. Big Bend National Park, Texas, November 23, 2007
 South Rim, view from Fresno Circle campsite near Dodson Trail. Big Bend National Park, Texas, November 23, 2007
 Boot Rock from Boot Spring Trail at sunrise. Big Bend National Park, November 28, 2009
 Casa Grande Peak of Chisos Mountains from Emory Peak Trail. Big Bend National Park, November 27, 2009
 Windmill near Road 40 near Santa Rosa, view from a bus. New Mexico, May 26, 2008
 Canyon of Smokey Creek. Big Bend National Park, Texas, November 25, 2007
 Lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Boot Rock, view from Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Lower (flat) part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Northeast Rim, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Crown Mountain, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Chisos Mountains with snow, view from Castalon Highway. Big Bend National Park, Texas, November 25, 2007
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Blue Creek Canyon (A trip to Big Bend Park, November 29 - 30, 1997)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 Chisos Mountains with traces of snow, view from Castalon Highway (Ross Maxwell Scenic Drive). Big Bend National Park, Texas, November 25, 2007
 Camping on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 - Boot Canyon trail 11/28/97 morning (A trip to Big Bend Park, November 27 - 28, 1997)
 Southeast Rim in fog. Big Bend National Park, November 27, 2009
 Prickly pears cactus on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Dry tree on South Rim. Big Bend National Park, November 28, 2009
 Dry juniper on South Rim. Big Bend National Park, November 28, 2009
 Agaves on South Rim. Big Bend National Park, November 28, 2009
 Cliffs of South Rim. Big Bend National Park, November 28, 2009
 Some brittlestem (Psathyrella) mushrooms near a primitive campsite a sharp bend of the creek near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
 Emory Peak Trail in fog. Big Bend National Park, November 27, 2009
 Pine tree on South Rim. Big Bend National Park, November 28, 2009
 Boot Spring Trail. Big Bend National Park, November 26, 2009
 Cacti and agaves on South Rim. Big Bend National Park, November 28, 2009
 Underside of some brittlestem (Psathyrella) mushrooms near a primitive campsite a sharp bend of the creek near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
 Dry juniper tree on South Rim at morning. Big Bend National Park, November 29, 2009
 Switchbacks of Blue Creek Trail. Big Bend National Park, November 29, 2009
 East summit of Emory Peak in fog. Big Bend National Park, November 27, 2009
 Crooked pine growing on South Rim. Big Bend National Park, November 28, 2009
 Elephant tusk Mountain from Southeast Rim. Big Bend National Park, November 28, 2009
 Crooked pine on South Rim at morning. Big Bend National Park, November 29, 2009
 Small greyling mushrooms Tephrocybe anthracophila on old bonfire site on a primitive campsite a sharp bend of the creek near Pole Creek on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, November 12, 2023
 Area of red rocks on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Most photographed spot with a pine tree on South Rim. Big Bend National Park, November 28, 2009
 Alamo Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 In Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 Frijoles Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Echinocactus horizonthalonius (devil s head cactus, or horse crippler) with daggerlike spines on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Cliffs of Toll Mountain from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Group of people with Dallas Sierra Club on Southeast Rim. Big Bend National Park, November 27, 2009
 Upper Alamo Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 Walls of Frijoles Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Walking near Alamo Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 24, 2008
 Christmas light decoration "Santa s Lane" in Central Park. College Station, Texas, December 29, 2009
 Fruit of cholla cactus (cylindropuntia) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Group of people with Dallas Sierra Club on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Century plant which bloomed, died, and tipped over, on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Area of pictographs in Frijoles Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Painted Cave in Capulin Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 25, 2008
 Fruits of Texas madrone (Arbutus xalapensis) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 One of eroded pinnacles of pink volcanic tuff on Blue Creek Trail. Big Bend National Park, November 29, 2009
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