does anyone know the song playing when marty goes to the alternate 1985 and goes up to biffs giant hotel

I think it is "I Can't Drive 55" by Sammy Hagar. I hope this helps. :)

Welcome to the board. B)

Yep. It's from 1984 and it originally appeared on Sammy's VOA album (also available on his 'Unboxed' and 'Essential Red' Greatest Hits collections now).

There's a cool, ironic BTTF/Van Halen connection: In Part 1, Marty played George a Van Halen guitar clip (when David Lee Roth was still the lead singer), and in Part 2, "Can't Drive 55" was from Sammy solo before he joined the band in 1985.

Oh, and welcome to the board, DeLoreanMan.:)

(P.S. Just wondering who you are, if you came from BTTF.com?)

I just wanted to say this was the exact song I was looking for and when I found this fourm I was all like YESSSSSSSSSSSSSSSSSSSSSSSSSSSSAAA because this would have be the exact same post I woulda put up.

Anyways thanks alot, cuz im real glad this was here

^ Welcome to the board. Feel free to ask anyone other questions, or play some games with us in those forums :)
And the same goes for you too, deloreanman