Groovy Man
I'm Not Like Everybody Else
Led Zeppelin - Dazed And Confused Live from The Song Remains The Same is almost 30 minutes long, 1 whole side of an album.
The live version of ''Green Grass and High Tides'' from the album Outlaws album ''Bring It Back Alive'' also takes the whole side of an album.
Here's a few more great long songs...
Kiss - 100,000 Years (Alive!)
Deep Purple - April
Rory Gallagher - Walk on Hot Coals (Irish Tour)
Johnny Winter - Sweet Papa John (Captured Live!)
Yes - And You and I
Pink Floyd - Dogs