Song of the River by Sue Harrison

Eighty centuries before our time, in the frozen, snowbound interior of a place that will someday be called Alaska, a beautiful young woman called K'os, of the Cousin River Village, is brutally attacked and ravaged by men from the Near River Village. With ruthless passion she vows vengeance on those who have wronged her. The next day, in the same place, K'os finds an abandoned baby - a child with a club foot who's been left to die. She adopts the babe as her own and names him Chakliux. Twenty years later, K'os has grown cold and cunning, obsessed with the desire for revenge and eager to create conflict. Chakliux, respected as his tribe's treasured storyteller, is sent back to the village of his birth, where he has been chosen to wed the shaman's daughter in order to bring peace to the Cousin and Near River People. But before he can win the people's trust, a double murder jeopardizes his mission and forces him to travel to distant lands. Ultimately Chakliux must grow and learn - driven by the ancient songs of sea and sky, earth and animals - as he seeks the truth about the offenses for which his people have suffered and about the woman who raised him, the hateful and ambitious K'os, who may be his most dangerous enemy of all.

This book is part of the "Storyteller" series.
Here are some other books from this series: