Ancestral Medicines
4-day Retreats, Tulum, Mexico

Growth, Transformation & Healing with Ayahuasca, San Pedro, Bufo Alvarius, Kambo and more.


September/October 2023 —   22-25 September 2023,
26-29 September 2023 —  30 Sept/03 October 2023

Led by International Facilitator and Trainer Frédéric Cherri.

Details, Dates, Fees, & Venue

A unique experience in Tulum, Mexico

This is an all-inclusive 4-day/3-nights)(accommodation, ceremonies and board), unique experience, in a stunning Jungle heaven of peace and tranquility in Tulum, Mexico: a carefully crafted program bringing together a variety of powerful ancestral medicines, presented and served by an entheogen expert, extensively trained in the art form of preparing, serving and integrating the experience.

This event is for first timers or adepts alike. It will allow for a deeper understanding of how these teaching medicines work, their healing powers and how they pollinate one another. Each retreat offers a safe introduction to the magic of sacred medicines with a total of 5 ceremonies. Each ceremony is first prepared then, integrated to allow you to make the most of the experience. All in a traditional approach, in nature settings and the comfort of a very comfortable retreat centre.

SpiritRivers on-site Assisting staff

Exceptionally and for this series of retreats you will benefit from the presence of 15 Entheogen ceremonial assistants-in-training on-site, on top of our 4 persons assistants team and the leader of this retreat, Frédéric Cherri.  This is to allow you to feel supported and for them to learn more about their craft.


The fee for this 4-Day retreat is $1390 per person and includes all ceremonies and shamanic processes, accommodation  and delicious vegan meals.  

Registration Process

To confirm your place on this program you only need to select your dates and pay your deposit here. You will then autmatically receive a 25 pages INFO-PACK, a guiding document to help you with preparation, setting intention, what to bring, diet and many other aspects of working with Ancestral Medicines.


Please check our itinerary and by courtesy for all, make sure to arrive on site on the first day well before the start of our program. Departures are on the evening of our last day.

Finally, we manage, sometimes, to secure remarkable live musicians for our ceremonies however, we can not guarantee their presence on all our retreats.

This 4-Day Retreat includes:

  • 1 San Pedro ceremony
  • 1 Ayahuasca ceremony
  • 1 Bufo Alvarius ceremony
  • 1 Kambo Cleanse ceremony
  • 1 Rapéh ceremony - Shamanic snuff
  • Preparation & Integration
  • Drum Journeys
  • Ancestral medicine explained
  • Ancestral lineage clearing
  • Animal Totem Journey
  • Live music on ceremonies pending availability
  • Navigation of entheogen space
  • Tools to extend integration


The Earth Medicines we will work with

San Pedro (Peruvian cactus)

Because it is a bit gentler than many of the other plant teachers, Huachuma has earned the nickname “The Grandfather” around the medicine community — Make no mistake though, San Pedro can produce as deep visions as any other entheogenic, Ayahuasca, Buffo Alvarius or Psilocybin mushrooms. However it is overall less intimidating, less jarring and more loving than many other plant teachers. — His main personality is two-fold: heart-opener...

Ayahuasca (Amazonian brew)

The Grandmother Ayahuasca is certainly to be respected as its strong spirit unfolds our minds and hearts to other realities and otherworldly experiences. It is a bright and convoluted teaching that will take you on a radiant journey. The teaching is also focused on the powers of the Intangible, it's residing spirits and the alliances we can make within those realms. The mission and personality of Ayahuasca is to educate and broaden our perception, to reform old limiting patterns, to ...

Bufo Alvarius (Mexican Toad)

Sapo (Bufo Alvarius) is the master of non-duality. It will show you what holds the cosmos. With practice it will also lead you to realise the mystical yet revealing link there is between the 'void' and it's purpose for our dayly-living. The experience of non-duality is counter-intuitively very practical as it allows us to live from the source, free from the hindrances of mundanity...

Kambo (Amazonian tree frog)

Kambocito, Kampu or Kambo has the propeties to reset your entire Immune system. It is very useful in our current times. It will also help you recode DNA. It works beautifully in preparation or as an adjuvent of other medicines. It's use is to be approached with respect, and trust in your Practitioner is paramount... We currently offer Kambo in almost all our retreats as it...

Rapé (Rapéh) Sacred Tobacco snuff

Rapé is a fine, light-colored powder containing tobacco and other medicinal and sacred plants, including tree bark ashes, leaves, seeds, and various herbs. Once collected, the components are pulverized with a pestle and filtered, The result is a fine powder blown into the nose.
Rapé brings you into a state of acute attention and awareness. The mind becomes calmer, negativity clears and emotional tensions are released. Participants often feel more grounded during the experience, allowing them to clear up confusions...

Our itinerary

Every single retreat is unique and changes can be made in accordance with how the energy is moving.
Any questions, please contact us!  in English, French or Spanish

Day 1

4pm: Arrival
5pm: Opening Ceremony & Preparation
7pm: Dinner

Day 2

8am: Teas, Fruit waters
9-4pm: San Pedro ceremony
4pm: Snacks
7pm: Dinner

Day 3

7am: Teas
8am: Kambo cleanse
10am: Integration
12pm: Brunch
1-8pm: Rest
9pm-3am: Ayahuasca
3-11am: Snacks then Rest

Day 4

11am: Light breakfast
12pm-6pm: Bufo Alvarius
6pm: Integration & Dinner
8pm: Departure


  • Please note to arrive on-site and on the first day of your retreat  NO LATER THAN 4pm to allow us to start on time.
  • Diet and fasting is paramount and required PRIOR to ANY CEREMONY. Upon registration each participant will be sent an information pack to help prepare with diet and how to set the proper intention.
  • Once your deposit is paid a medical questionnaire will also be sent to you. We may decide to establish a Zoom call prior to confirming your enrolment, to further our understanding of your health background and how to ensure your safety during this program.



The fee for this 3-Day retret retreat is $1390 per person.
To lock your place in this retreat you only need to pay a non-refundable deposit of $USD500 using the methods of payment below.

What’s included

All ceremonies and all shamanic processes.

What’s not included
  • Our retreat fee does not include board (accommodation and meals). This needs to be arranged AND PAID  DIRECTLY to the retreat center Pachalegria in Zipolite, Mexico. Pachalegira retreat centre offers a choice of rooms in double-occupancy only.
  • Flight fares and transportation costs to or from the airport to the retreat center are not included. 

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Board needs to be arranged with our venue directly. Please contact us for the venue details.

Payment options: Cash on site or online below by Credit Card (Visa, MasterCard, American Express, Discover, JCB, Diner’s Club and EnRoute).
Contact Us with any question by email in English, French or Spanish.

Our retreat Centre

Our retreat Center is a fabulous centre in the mexican jungle  and completely private. It is located 90mins from the International airport of Cancun (CUN) and 20mins away from the famed village of Tulum.

How to get there:

From Cancun airport you have a raft of options to reach the centre:
You can take a taxi from Cancun airport  for around $80 US. There is a taxi stand outside the airport on the main road which is usually cheaper than booking a taxi inside the airport.
You can also take a combination of bus or shared vans which is a bit more complicated but not imossible.
You also have in the airport a Bus station that will take you to our spot for about $35

A few pictures of our Venue:


Who we are —  The team

Your guide on the journey, Frédéric Cherri

By nature, I'm not very fond of labels or titles. However, if I had to describe my path I would say that I’m mostly a practitioner of the shamanic arts, a therapist with 30yrs of clinical practice and tutoring in the field of cranial osteopathy, specialising in trauma, immune disorders and perinatal issues. I've also trained extensively for the last 25 years in the shamanic arts, and dedicated much of my time to living and studying with indigenous communities in many parts of the world.

I’m finally an entrepreneur, a retreat leader, a program teacher, a ceremonialist, a shamanic practitioner, an entheogen integration specialist and a personal coach. Years of study and practice on the path of workshop facilitation, field research and clinical & therapeutic work have led me to believe we can heal anything.

I'm also aware of being a bit of an 'oddball' in the realm of ancestral medicines, as I've trained (and keep training) in a variety of medicines and within different traditions. A medicine man or woman is usually a one-medicine specialist and trains in one sole tradition. I have answered the specific calls from some of these remarkable medicines and travelled wide and far to different jungles and mountains to work and study with varied first-people communities on this planet.

I believe there is a need for people like me to help bridge, protect and disseminate to a western audience the extraordinary wisdom of the first nations who share these medicines. Shamanic work and one of its mysterious and exciting aspects, the realm of plant or earth medicine, brings many answers to the unresolved issues of modern medicine or psychology. I have dedicated my life to supporting others’ journeys, growth, and transformation and am delighted to answer any questions via Zoom or WhatsApp chat. Schedule a free call here. Or leave me a message on WhatsApp at +52 998 354 2178

Support and assisting team

Rogelio Kuntur Cristal

Ceremony Assistant, Nutrition Specialist

For over 20 years, Rogelio has worked in different areas and fields, always in service of love, healing and creativity, and active in supporting and creating transformational and evolutionary spaces.
Having refined his offering in one of his main passions: vegan, gluten-free and sugar-free nutrition, he also learned how to support people in their healing processes. He now finds himself serving within the ceremony space, practising compassion and presence, as well as deepening his understanding of the plant medicine realm.

Amy Lynn Allen

Facilitation support

Amy Lynn is a Shamanic doula, assisting Soulful transformation; the cycle of birth, death, and a guide to one’s own innate possibility, potential, awareness and wisdom. Focused on holistic healing, personal growth, and Spiritual transformation

She is dedicated to awakening the power of co-creative perception by inspiring a new collective vision and possibility, reconnecting with Earth, spirit and community .

Geovanna Arias
Operations & Management

Geovanna is a passionate advocate for natural and holistic healing, plant medicines as powerful tools in helping others work through trauma, depression, anxiety, and pain. She's joined many retreats with Frederic and gained hands-on experience with Huachuma, Ayahuasca, Bufo, Peyote and Kambo. Following her move to Mexico in 2022, she set out to continue helping others find healing and transformation with entheogens and as a way of inspiring growth and positivity in this world.

Ray Bueno
Logistics, Ceremony Assistant

Ray Bueno is a Marine combat veteran and marketing and logistics manager for SpiritRivers International. After struggling with PTSD and depression, he answered the call to a plant medicine retreat in Mexico with Frédéric. Since, he has been passionate about learning more about plant medicine and its potential to heal individuals and communities. He is an advocate for veterans and believes that plant medicines can be a powerful tool in helping veterans suffering from PTSD, chronic pain, and other conditions.