 One of eroded pinnacles of pink volcanic tuff on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Sandy washes of Blue Creek Canyon near Homer Wilson Ranch. Big Bend National Park, November 29, 2009
 Slopes of Chisos Mountains from Pinnacles Trail. Big Bend National Park, November 26, 2009
 Fall colors of Chisos Mountains from 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
 Group of people with Dallas Sierra Club on Pinnacles Trail. Big Bend National Park, November 26, 2009
 Switchbacks of Blue Creek Trail. Big Bend National Park, November 29, 2009
 Area of red rocks on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Boot Canyon Trail ending at Southeast Rim. 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
 Fruit of cholla cactus (cylindropuntia) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 - 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)
 Fruits of Texas madrone (Arbutus xalapensis) on Blue Creek Trail. Big Bend National Park, November 29, 2009
 Weathered wood on Pinnacles Trail near Juniper Flat. Big Bend National Park, Texas, November 22, 2007
 Upper part of Boot Canyon. Big Bend National Park, November 27, 2009
 Fall colors of Boot Canyon. Big Bend National Park, November 27, 2009
 Pink Canyon (?) from Blue Trail in western Timna Park, 13 miles north from Eilat. The Middle East, November 7, 2002
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 - Pinnacles trail (A trip to Big Bend Park, November 27, 1997, morning and day)
 Santa Elena Canyon and mountains in Mexico from SW3 (Southwest Rim) campsite at sunrise. Big Bend National Park, November 29, 2009
 - Pinnacles trail - Mandrone (mandrono) (A trip to Big Bend Park, November 27, 1997, morning and day)
 Totem-like columns of volcanic tuff across Limpia Creek, view from Road 17. Fort Davis, Texas, December 29, 2007
 Santa Elena Canyon west from Smokey Creek Trail east from Mule Ear Spring. Big Bend National Park, Texas, November 25, 2007
 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
 Lower (flat) 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
 Northeast Rim, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 Pink Canyon (blue trail) in western Timna Park, near Eilat. The Middle East, April 25, 2001
 Pink Canyon (blue trail) in western Timna Park, near Eilat. The Middle East, April 25, 2001
 Crown Mountain, view from lower part of Juniper Canyon Trail. Big Bend National Park, Texas, November 23, 2007
 A wadi approaching Pink Canyon (blue trail) in western Timna Park, near Eilat. The Middle East, April 25, 2001
 - 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)
 Camping on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Prickly pears cactus on a small ridge near Juniper Canyon Trail south from Upper Juniper Spring. Big Bend National Park, Texas, November 22, 2007
 Boot Spring Trail. Big Bend National Park, November 26, 2009
 Emory Peak Trail in fog. Big Bend National Park, November 27, 2009
 Pink flowers of pea family on Prairie Trail in Brazos Bend State Park. Needville, Texas, April 11, 2009
 Cliffs of Toll Mountain from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Emory Peak from lower section of Southwest Rim Trail. Big Bend National Park, November 28, 2009
 Slopes of Chisos Mountains from Boot Spring Trail. Big Bend National Park, November 26, 2009
 Slopes of Chisos Mountains east from Boot Spring Trail. Big Bend National Park, November 27, 2009
 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
 White sands from eroded cliffs along the blue trail in western Timna Park, near Eilat. The Middle East, April 25, 2001
 - 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)
 - Boot Canyon 11/27/97 evening (A trip to Big Bend Park, November 27 - 28, 1997)
 Copper minerals in white sand from eroded cliffs along the blue trail in western Timna Park, near Eilat. The Middle East, April 25, 2001
 Southeast Rim in fog. Big Bend National Park, November 27, 2009
 Boot Rock from Boot Spring Trail. Big Bend National Park, November 28, 2009
 Boot Rock from Boot Spring Trail at sunrise. Big Bend National Park, November 28, 2009
 Boot Rock, view from Boot Spring Trail. Big Bend National Park, November 27, 2009
 View of Boot Rock from Boot Spring Trail. Big Bend National Park, November 27, 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
 Dry tree on South Rim. Big Bend National Park, November 28, 2009
 Casa Grande Peak of Chisos Mountains from Emory Peak Trail. Big Bend National Park, November 27, 2009
 Pine tree on South Rim. Big Bend National Park, November 28, 2009
 Sunset from SW3 (Southwest Rim) campsite. Big Bend National Park, November 28, 2009
 Agaves on South Rim at sunrise. Big Bend National Park, November 29, 2009
 Cacti and agaves on South Rim. Big Bend National Park, November 28, 2009
 Crooked pine on South Rim at morning. 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
 Dry juniper tree on South Rim at morning. Big Bend National Park, November 29, 2009
 Elephant Tusk Mountain from South Rim at sunrise. Big Bend National Park, November 29, 2009
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