Interesting to consider why they might have wound up at Cooper's on the Salmon River https://en.wikipedia.org/wiki/Salmon_River_(Idaho) https://en.wikipedia.or

Interesting to consider why they might have wound up at Cooper's on the Salmon River https://en.wikipedia.org/wiki/Salmon_River_(Idaho) https://en.wikipedia.org/wiki/Salmon_River_(Idaho) instead of going farther up the Columbia. Might not have been a viable option! https://en.wikipedia.org/wiki/Cordilleran_Ice_Sheet https://en.wikipedia.org/wiki/Cordilleran_Ice_Sheet "On the western edge at the Haida Gwaii ... the lower thickness of the ice sheet meant that sea levels were as much as 170 metres lower than they are today.... migrants ... were able to travel southward during the deglaciation process due purely to the exposure of submerged land between the mainland and numerous continental islands...."