NSS-CDS Winter Workshop

We are thrilled to be holding our 2026 Winter Workshop (WW26) inTulum, Mexico, our very first international event held outside theUnited States.

Join us and our hosts at Underworld Tulum from February 20 – 27, 2026.

The venue is limited to 50 participants. Tickets will go fast so we areoffering them to members first during the month of July. We willopen sales to non-members on August 1, 2025 so get your tickets today!
If you can’t make it, consider buying raffle tickets to win our grandprize, a Cave Diving Trip for Two to Tulum as you need not be present to win.

The National Speleological Society Cave Diving Section (NSS-CDS) is proud to partner with Underworld Tulum for this special event!

Dive into an unforgettable experience, February 20–27, 2026

Set on the Caribbean coast of Mexico’s Yucatán Peninsula, thisunique event will bring together cave divers, instructors, explorers,and researchers from around the world.
During this week-long workshop enjoy a dynamic mix of daytimecave diving in stunning caverns and caves gloriously decorated withspeleothems and early evening socials and informal “fireside chats”that foster global friendship and knowledge-sharing. The event line up also features formal presentations, meet and greets, raffle prizes,awards and more—all designed to inspire, educate, and bring theglobal diving community together.

Event lineup includes:
Daytime cave diving in stunning caverns and caves gloriouslydecorated with speleothems
Early evening socials and informal “fireside chats”
Evening Formal presentations
Meet & Greets
Raffle Prizes
Awards
Grand Prize Raffle Winner Announcement

And more!

Special guests include:
Michael Menduno – InDepth Magazine
Ricardo Castillo – Dive Rite Mexico
Roger Williams – XOC-Ha
Lanny & Claire Vogel – Underworld Tulum

More to come!

Click here for tickets!

Grand Prize Raffle
Cave Diving Trip for Two in Tulum
(Need not be present to win!)

Tickets: $25
Over $3,650 Value
7 days and 6 nights of Lodging at Underworld Tulum (double occupancy)
5 days of diving – Dive guide on 2 of the 5 days*
Rental cylinders and weights
2 Underworld Tulum T shirts
Up to $200 total breathing gas allowance
Up to $400 rental car reimbursement
Up to $1,000 total airfare allowance

Drawing to be held Thursday February 26, 2026 around 7:00 PM at Underworld Tulum

Click here for more information or to purchase a Grand Prize Raffle Ticket

Thanks To Our Sponsors!