In 1891, a moral reformer named Alzire Chevaillier launched an aggressive crusade to destroy Fountaingrove, a spiritualist utopian colony in Northern California with white and Japanese members. Chevaillier accused the colony's leader, Thomas Lake Harris, of promoting “disorderly doctrines” with sexual practices “worse than those of Mormonism.” This essay uses the little-known Fountaingrove scandal to examine the interrelationship of religion, race, and sexuality in California. As a mixed-race new religious movement accused of sexual immorality, Fountaingrove transgressed prevailing norms in multiple ways. The colony became Orientalized in the public imagination, showing how new religions and non-normative sexual practices were coded as racially other. Yet media representations of Fountaingrove reflected more than straightforward “yellow peril.” The Japanese members of Fountaingrove inhabited several unstable categories at once, viewed as neither “heathen” nor Christian, neither adults nor children, neither white nor Chinese, shedding light on the uncertain religio-racial status of early Japanese immigrants to the United States. The scandal also reveals the racist dimensions of white female reformers' attacks on male dominance. The wide range of public response to Chevaillier's campaign, from moral disgust to amusement to apathy, gives evidence of the cultural fissures beginning to break open in fin de siècle America.