This catalog-backed guide explores projectile point references that explicitly mention Montana. It is an identification starting point, not a record of private finds or archaeological site locations.
Archaic (8,000-200 BCE): McKean, Pelican Lake, and Besant traditions
Late Prehistoric (200-1,800 CE): Avonlea and Prairie Side-Notched bison hunters
Plains Village (1,000-1,700 CE): Semi-sedentary villages along Missouri River
How to Identify a Montana 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.