GARDINER, Mont. (AP) — Leaders of Native American tribes gathered this weekend to urge the U.S. government to rename a valley and a mountain in Yellowstone National Park.

They say the names are associated with a man who advocated killing Native Americans and another who did just that.

The Billings Gazette reports (http://bit.ly/2fsd9jM) the tribal leaders delivered a petition Saturday to park officials noting their opposition to the names of Hayden Valley and Mount Doane.

Doane was attached to a U.S. Army cavalry company that participated in a massacre of non-combatant Indians.

Hayden, whose explorations were a key element in the eventual creation of the park, called for exterminating American Indians who wouldn't become farmers and ranchers.

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Information from: The Billings Gazette, http://www.billingsgazette.com