The National Park Service invites the pub­lic to the 16th annual Native American Heritage Days on the North Rim of Grand Canyon National Park. This event, which cel­e­brates the rich cul­tural diver­sity of the Colorado Plateau, the Arizona Strip and the Grand Canyon, will begin with a morn­ing nature walk on Thursday, August 13, 2009, and will end with a spe­cial evening pro­gram on Friday, August 14.