I used to live near a pretty big Indian rez in Cali, there were some big dudes and guys that juiced there. Lots of the guys were into getting huge and tatted up, smoking lots of weed, they were cool guys, really cool people.
Not competetive at all and not into pro BB, just into getting big and ripped. They had a local bodybuilding event on the rez for native residents only and some guys competed there. But it was just totally amatuer with a hundred dollar prize or something.