Churches, retreats and practitioners that hold ceremonies in Colorado: ayahuasca ceremonies, kambo, Bufo (5-MeO-DMT), psilocybin and cacao. Several are churches, and one trains kambo practitioners. Each listing links to the group's own website, and its reviews come from people who attended.
Colorado also runs a state-licensed psilocybin program, which works differently from a church or retreat. Our guide to psilocybin in Oregon and Colorado explains the difference.

