Bobcat

Bobcat is a historically based action-frontier fiction, circa 1804. The main character is a Quapaw Native American whose life has been disrupted forever. He journeys west, riding beside the Canadian River across the Great Plains to stand atop the tallest of the white capped mountains, and consider his life. Along the way he meets the free-roaming hunting and gathering tribes whose ways are changing, as horses and French/American factory trade goods reach them.
The pueblo tribes farther west trade only with Spain.
Their homelands invaded some people fight, some hide and some change a little.