This catalog-backed guide explores projectile point references that explicitly mention Idaho. It is an identification starting point, not a record of private finds or archaeological site locations.
Paleo-Indian (12,000-8,000 BCE): Wilson Butte Cave evidence, Western Stemmed points
Archaic (8,000-200 BCE): Northern and Western traditions merge
Late Prehistoric (200-1,850 CE): Shoshone and Nez Perce traditions
How to Identify a Idaho Arrowhead
Compare the base, stem, notches, flaking, material, and overall outline with the linked type guides. Similar point styles can span neighboring regions and long periods, so provenance and expert review still matter.