Longest bass solo? (in rock)
 

What is the longest unaccompanied bass solo on record that you have heard? The longest I can think of is Jon Camp's Rickenbacker solo on the 1976 Renaissance album "Live at Carnegie Hall". It lasts a full 4 minutes and 15 seconds, with no one else playing at all. He uses an Echoplex to nice effect on the last minute or so.

Billy Sheehan has a 6 min bass solo on the Back to Budokan live album.

It depends on how you define the word "solo". Gene Simmons solos' usually lats around 10 minutes but he really doesn't do much during them other than play a couple of random notes and then get hoisted to a platform above the stage. At that point he spits blood, plays a little more and then the band goes into a song, usually "God of Thunder".

Martin Turner on Handy's intro is kinda of a Bass Solo and it's long. If you've never heard it you might enjoy it.

Kind of hard to answer, considering Wooten kind of has a two hour solo every night. There's a long Entwistle solo on Youtube that I'm sure we've all seen before.