River Statistics (includes river use statistics for calendar year 2008 plus statistics for all lotteries held for calendar year 2008 launch dates) - PDF file, 340kb
Calendar Year 2007
River Statistics (includes river use statistics for calendar year 2007 plus statistics for all lotteries held for calendar year 2007 launch dates) - PDF file, 300kb
Did You Know?
The Cambrian seas of the Grand Canyon were home to several kinds of trilobite, whose closest living relative is the modern horsehoe crab. They left their fossil record in the mud of the Bright Angel Shale over 500 million years ago.