longitude 214373 8841 big bend national park

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Martin Canyon. River Mile 676.9. May 2007.

Martin Canyon. River Mile 676.9. May 2007.

Rio Grande vegetation monitoring, Martin Canyon photopoint at river mile 676.9, May 2007.

Martin Canyon. River Mile 676.9. April 2009.

Martin Canyon. River Mile 676.9. April 2009.

Rio Grande vegetation monitoring, Martin Canyon photopoint at river mile 676.9, April 2009.

Martin Canyon. River Mile 676.9. April 2012.

Martin Canyon. River Mile 676.9. April 2012.

Rio Grande vegetation monitoring, Martin Canyon photopoint at river mile 676.9, April 2012.