"Big Log" is a song by English recording artist Robert Plant.

"Robbie (Blunt, guitarist) arrived, liked the groove, and very quickly we had the main chords.

The middle eight came from my Godwin string synth machine, and Robbie came up with the haunting theme.

Cash Box compared the synthesized drums and claps to Marvin Gaye's "Sexual Healing" and praised Plant's vocal.

Krauss' sister Alison – who recorded Raising Sand with Plant three years later – sang lead vocals.