Top 5 guitar jams

funkadelic (maggot brain) 10 mn of smoking guitar solo.
Dire straight
Stevie ray V.
Juan Martin
....

Hear are are some of my favorites in no particular order:

Dreams - The Allman Brothers. Duane's slide is truly magical.

Train Kept a Rollin' - Aerosmith. Rumor has it that Dick Wagner and Steve Hunter are playing the serious solos.

Goin' Down - Jeff Beck Group. Jeff pulls out all his tricks on this one.

Santana- Soul Sacrifice. Great music from one of the best.

Jimi Hendrix - Stone Free. Live from "The Jimi Hendrix Concerts" double album set. Just mind boggling what he can do.

As an added bonus, how about Alvin Lee's playing on Woodchopper's Ball?

I can put in a vote for "Green Grass and High Tides" off the cuff.

I saw Dylan and his band a few years back. The songs were of secondary importance. When they jammed, it didn't matter what song they were playing, they were tight and like a machine in a groove that could just keep on going....

Neil Young and Crazy Horse have been known to get in a groove from time to time as well. The Greendale CD is a prime example of Crazy Horse going on and on in various grooves that draw the listener in over time.