Thanks for the memories!
I spent many an hour in black light illuminated rooms, sitting in bean bag chairs, listening to Mountain. The walls were replete with glowing posters and paisley tapestries. The odor of reefer mixed with patchouli incense was thick.
Anyway… I saw Mountain in 1971 in Westwood NJ.
I still listen to them when I wax nostalgic.
I know I have posted some of my favorite tunes of theirs here previously.
But here are two of my faves (in addition to Mississippi Queen)