Denver voters decriminalized hallucinogenic mushrooms, becoming the first U.S. jurisdiction to do so. Oregon and California could follow.

While the active ingredient psilocybin is not a major reason for arrests, the move is a big step towards legitimacy for a drug which has attracted speculation and investment in its potential medical benefits, notably depression.
N.Y. Times

At the Colorado state capitol, Gov. Jared Polis (D) is on the brink of making Colorado a much friendlier state for the cannabis industry. He and “de-felonizing” possession of Schedule I and II controlled substances.
Westword, ABC

Colorado authorities, including Gov. Polis’ office, have not responded to my queries about regulation in Colorado.