Riviera Maya (Quintana Roo) · about 11 km from Akumal
Coop One (K'oox Baal)
- Max depth14 m (46 ft)
- CertificationFull cave
- Water temperature≈ 24–25 °C (75–77 °F)estimated, no reports yet
Diving and fills
Dive here with
Fills nearby
- Akumal Dive CenterNitrox; trimix and CCR courses on the site — ask about O₂/He fills
- ProTec TulumAir, EAN32, O₂ up to 200 bar, trimix on request (booster); Sofnolime 797 always in stock
- Ko’ox Diving (Tulum)Air, nitrox, O₂ and helium mixes (He about US$2/cf)
What it looks like
Cave diving with Martin Demers in Cenote Coop One in Mexico (2022) with Polish Corner Cave diving Mexico - Coop One to Tres Estrellas Cave diving in Cenote Coop One Cave Diving Cenote COOP ONE!! 💪
All 4 videos and posts
Videos and posts
From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.
Cave diving with Martin Demers in Cenote Coop One in Mexico (2022) with Polish Corner Cave diving Mexico - Coop One to Tres Estrellas Cave diving in Cenote Coop One Cave Diving Cenote COOP ONE!! 💪
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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.
The dive
Coop One, also called 'Tam Hol' (Big Hole), is an entrance to Sistema K'oox Baal (Maya: ‘wild thing’), which was about 123 km long in 2025.
Part of Sistema K'oox Baal. Also in this system: Nai Tucha (K'oox Baal / Tux Kupaxa), Tres Estrellas (K'oox Baal)
Profile and sections
Coop One, also called 'Tam Hol' (Big Hole), is an entrance to Sistema K'oox Baal (Maya: ‘wild thing’), which was about 123 km long in 2025. The QRSS lists 103.1 km surveyed, down to -26.2 m (QRSS, Jan 2025).
Practical: Coop One is on the same ranch as Tres Estrellas and Nai Tucha.
- Depth and profile
- Max about -14 m
- Configuration
- All configurations
- DPV: DPV possible (estimate)
- In 123 km K'oox Baal (explored with scooters), but delicate entrance and decorated canyons; no DPV info here
Who can dive where
- At least Full cave
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 14 m (trimix or deco may be needed)
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
From Chemuyil take the dirt road; turn left at the four-way junction (20.3736, -87.4105), through the ranch gate; first developed cave on the property. Underground entrance with stairs/ladder to the water. Arrange dives with the owners on site (combine with Nai Tucha/Tux Kupaxa). Fee unknown.
Around Coop One (K'oox Baal)
Fills3 fill stations · nearest 11 km
Akumal Dive Center
Carretera 307 km 104, Akumal
Nitrox; trimix and CCR courses on the site — ask about O₂/He fills
Daily 8–17
On the beach at Akumal. Since 1975; mainly reef and cenote diving, tec offer via course pages. Not to be confused with the Akumal Dive Shop next door.
ProTec Tulum
Av. Satélite / Calle Tun-Kul, Tulum
Air, EAN32, O₂ up to 200 bar, trimix on request (booster); Sofnolime 797 always in stock
Daily 8–19
Rental of CCR, scooters, sidemount and double cylinders; CCR room for 14 units. ProTec Playa merged into Tulum in 2026. Keys for Xa'ay Ha (Chi Keen) and Doggi/Style (Muyil) are collected here.
Ko’ox Diving (Tulum)
Tulum
Air, nitrox, O₂ and helium mixes (He about US$2/cf)
Daily 7:30–21:00
Fills CCR, stage and double cylinders; cave gear for rent. Card payment accepted. The site also lists a Puerto Aventuras branch (Hwy 307 km 269.5, 7:30–21:00), but it is not on Google Maps — ask whether it exists and fills.
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