By 1967 he'd formed his own group Electric Flag to get away from the heavy touring schedule but by 1968 that had disintegrated into rivalries between members, shortsighted management, and heroin abuse. A pattern that would also repeat in other guitar superstars of the era.
In 1981 he was found dead in his car in San Francisco from an accidental heroin overdose although the circumstances surrounding his death are still somewhat strange.
Here's some rare footage of Bloomfield and Electric Flag at the 1967 Monterey Pop Festival. (also with Buddy Miles on drums, who 3 years later goes on to Hendrix's 'Band Of Gypsies' )
Also note, this is what a happy audience looks like.