Psychedelic Retreat Upon the Matter
With Marieke van der Spek and Eric van der Hoeff
November 26 - 29, 2026
This 4-day psilocybin retreat is all about self-exploration, letting go, and personal growth. Through two guided psilocybin journeys, you’ll have the space to meet and explore different parts of yourself.
A retreat focused on self-discovery and personal growth
Upon the Matter literally means “taking the whole picture into consideration.” During this retreat, we invite you to look at yourself with openness and curiosity. You’ll explore not only who you are, but also the patterns, desires, and possibilities that live within you.
In a safe and welcoming environment, with plenty of space for rest and comfort, you’ll be able to fully surrender to two guided psilocybin journeys on Friday and Saturday.
A retreat for those seeking deeper insight, greater clarity, and a renewed connection with their inner compass.
Experience has taught us that two journeys in a row is the most beautiful combination of mental traveling. In between the two journeys there is time for rest, wellness and guidance. Delightful in our beautiful natural surroundings among the fruit trees with delicious and healthy food.
Prior to this retreat we have an online intake interview, an online introduction group call and after the retreat an online integration group call.
The retreat starts on Thursday in the afternoon (flexible arriving time between 3pm and 6pm) and ends Sunday around noon.
Everything during this retreat is aimed at getting you to completely unwind physically and mentally.
Does this spark your curiosity ?
About the Leaders
Marieke van der Spek
Marieke has fully focused on personal development, leadership and how psychedelics can support this. She has 20 years of work experience at various large organizations in positions where cooperation and personal development were central. Marieke is a certified coach, trainer and psychedelic practitioner. She applies her knowledge and experience to facilitate others in their personal […]
Learn more about Marieke van der SpekEric van der Hoeff
Eric has worked successfully as an entrepreneur in fruit cultivation for 30 years. He built, together with 3 partners, an international cultivation consultancy for fruit growers. This company grew into a respected and leading company in the sector. Working with and in nature, the trees, the soil and his customers gave him a lot of […]
Learn more about Eric van der Hoeff