If you are looking for safe, legal access to psychedelic therapy (such as MDMA for PTSD), your best start might be to search for clinical trials or an expanded access site in your area. You might also find international retreat centers offering medicine work, such as with psilocybin mushrooms, in places where these medicines are not illegal. One such option is MycoMeditations in Jamaica, or Synthesis in The Netherlands.
You might also decide to explore other legal options, such as ketamine-assisted therapy or cannabis-assisted therapy. Below are a few centers or clinics that offer various medicine-assisted treatments in Colorado.
If you are looking for a psychedelic-friendly therapist or someone who can support you in exploring ceremony or spirituality, visit the community of practitioners at An Enduring Love. Some of these practitioners also specialize in psychosocial-spiritual support for persons stopping or considering stopping a prescribed psychiatric drug, such as coming off of an antidepressant or a drug cocktail. This website also includes information about psilocybin therapy for end of life care under the Right To Try Act.
For other education and advocacy opportunities, visit your local Psychedelic Club. Denver, Boulder, and Fort Collins all have one! Some clubs also offer peer support integration groups.