From the River Information Center

At this time there are no new 2008 river audiocasts. Below are links to mp3 files of 3 audiocasts made from the parks Non-commercial River Trip Orientation Video. To view or download the video chapters themselves, jump to River Trip Orientation Videos.

Any new river audiocasts will be available on this page. 

iPod users, these programs are also available on the 
Grand Canyon River  iTunes Podcast Channel

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Three Mp3 audiocasts made from Grand Canyon National Park's Non-commercial River Trip Orientation Video may be downloaded by cutting and pasting the links from the programs below into your media player.

1) Lee's Ferry to Diamond Creek Audiocast Duration 36:00 (17.5MB MP3 File)
  Download the Transcript (109kb PDF File)

http://www.nps.gov/grca/photosmultimedia/upload/grca_lees-diamond.mp3

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2) Diamond Creek To Lake Mead Audiocast Duration 3:27 (1.7MB MP3 File)
  Download the Transcript (12kb PDF File)

http://www.nps.gov/grca/photosmultimedia/upload/grca_diamond-lame.mp3

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3) Native American Perspectives Duration 5:42 (2.95MB MP3 File)
  Transcript in preparation

http://www.nps.gov/grca/photosmultimedia/upload/grca_native_perspectives.mp3