Great song from the movie Into the Wild. Composed together with Eddie Vedder and Kaki 
I didn't figure out the intro but this is the part were the chords come in.

Verse:
Am C G F
Am C G
Am C G F
Am C G

Bridge:
F Am G

Verse:
Am C G F
Am C G
Am C G F
Am C G

Bridge:
F Am G
F Am G

Outro:
F G Am