Yes, the soundtrack is great as it contains quite a few songs by The Doors, the best band ever. I am not sure why you used the word "country" songs though, "San Francisco" by Scott McKenzie is a rock song.  The only rock bands that would be country are The Byrds and The Eagles.
Most other rock is blues based. Going back further, country in general is taken from black country blues. Hank Williams can be considered blues.

Well, I do listen to a lot of old school music, and sometimes they do help me relax because most of it is much more different than the music that is being made these days.