7-Day Residential Psilocybin Group Retreat in The Netherlands
With Dr. Lisa Brinkmann and Claire Mathews
June 22 - 28, 2026
A Transformational Journey into Non-Ordinary States of Consciousness.
This is an invitation to journey inward – into the vast depths of your own psyche, spirit, and being – guided by the Grof lineage of psychedelic therapy.
In this intimate 7-day retreat, each participant will experience two psilocybin sessions, supported at all times by a sitter and an experienced facilitation team. The retreat includes comprehensive integration processes, both during and after the experience, ensuring that your insights become meaningful change. Places are intentionally limited to a maximum of 10-12 participants so we can maintain the depth, presence, and individual attention this work requires.
This retreat is rooted in the pioneering work of Dr. Stanislav Grof, one of the world’s foremost researchers into psychedelic therapy and non-ordinary states of consciousness. A hallmark of the Grof Legacy approach is the sitter–experiencer model, where participants work in pairs.
On two days, you will journey with psilocybin as an experiencer, held by a dedicated sitter and a team of facilitators. On two other days, you will hold space for someone else’s journey. This reciprocal process creates profound connection, safety, and reverence—enriching both the giver and the receiver.
This retreat is designed for those with a sincere intention for healing, insight, or spiritual growth. Whether you are new to psychedelics or already experienced, the Grof framework offers a powerful and contained space for profound transformation.
All participants undergo a comprehensive medical and psychological screening. This retreat is not suitable for individuals with certain psychiatric diagnoses or those taking contraindicated medications. Safety and integrity are central to our work.
Our retreats are led by certified Grof Breathwork and Psychedelic Therapy Facilitators from the GLT Nordic Faculty. Each facilitator has extensive experience holding space in expanded states and trauma-informed care.
Integration as a core practice:
The real journey begins after the ceremony. Psychedelic experiences can offer profound insights, emotional breakthroughs, and deep healing — but without integration, those powerful moments risk fading into memory. At our retreats, we emphasize integration because it’s where true lasting transformation happens.
Integration is woven throughout the retreat and continues beyond the 7 days we spend together.
We offer daily integration circles during the retreat, a full day dedicated to integration (Day 6), one post-retreat online group integration session, and a private Whatsapp or Telegram group for continued connection.
Extra personalized 1:1 sessions will be available at an additional cost for those who want to delve deeper or get extra support outside of the group setting.
About the Leaders
Dr. Lisa Brinkmann
Lisa is a clinical psychologist and psychotherapist working in adult and adolescent mental health for over 20 years and is one of the GLT Nordic Faculty Members. GLT Nordic offers Grof Legacy Training in the Nordic Countries, the UK and Ireland. This groundbreaking training is created in collaboration with Dr. Stanislav Grof and his wife […]
Learn more about Dr. Lisa BrinkmannClaire Mathews
Claire is one of our GLT Nordic Faculty Members. GLT Nordic offers Grof Legacy Training in the Nordic Countries, the UK and Ireland. This groundbreaking training is created in collaboration with Dr. Stanislav Grof and his wife Brigitte Grof and is based on his research into psychedelic therapy, holotropic breathwork, transpersonal psychology and spiritual emergence. […]
Learn more about Claire Mathews