Red Dead Redemption 2 has 30 Dinosaur Bone Locations. Finding all Dinosaur Bones in RDR2 is needed for 100% Completion. They are a type of collectible and part of the A Test of Faith Stranger Mission. They also count as a Collectible Strand for the Collector's Item trophy or achievement.

None of them are missable. The earliest you can accept the Stranger Mission is in Chapter 2 but it can't be completed until after the story because 8 bones are in the New Austin area which has bounty hunters that will instant kill you. After the story they go away and you can access the full map. In the progression checklist it only counts as completed after finishing the associated stranger quest by Deborah MacGuiness "A Test of Faith". Just collecting the bones is not enough and does not add anything to your game progress.

These collectibles are big bones, usually found on top of mountains near cliffs. After you find them all, Deborah MacGuiness (the quest giver) will restore the skeleton. The guide below will walk you through the A Test of Faith mission and show you all dinosaur bones locations.

Always use eagle vision when near a collectible to highlight it (press L3 + R3 / Left Stick + Right Stick).