Cabo Pulmo National Park is often described as a conservation miracle. Its transformation from an overfished reef to a thriving marine sanctuary teeming with Bull Sharks and massive Jack Fish tornados is a testament to strict environmental protection.
However, protecting this UNESCO World Heritage Site requires uncompromising rules. Unlike most diving destinations around the world, you cannot simply request or book your preferred dive sites in advance.
At Mexico Travel Adventure, we believe in 100% transparency. Many travelers arrive in Cabo Pulmo expecting guaranteed encounters with Bull Sharks, only to be surprised by the park’s strict access limitations.
On this guide, we break down the exact rules, the carrying capacity limits, and how the official weekly lottery system determines where you will dive.
The Foundation: Maximum Boat Capacity
The first rule of Cabo Pulmo is designed to prevent overcrowding and minimize the human footprint on the delicate reef structure. You will not find large, crowded dive boats here.
Every single vessel operating within the National Park boundaries is strictly limited to:
- A maximum of 6 divers.
- Plus 1 official, mandatory park guide.
This intimate 6:1 ratio ensures personalized supervision, maximum safety, and guarantees that the marine life is never overwhelmed by large groups of tourists.
The Core Concept: Popular Sites vs. Open Sites
To understand how diving works here, you must understand that the park is divided into two categories of dive sites:
The Top 5 High-Demand Sites:
- El Vencedor.
- Los Morros
- El Cantil
- El Bajo
- El Islote
These five locations are subject to a strict “Carrying Capacity” (Weekly Diver Limit) and are governed by a lottery.
The Rest of the Park: There are many other beautiful dive sites in Cabo Pulmo. These secondary sites do not have strict weekly limits and are not subject to the lottery system. They can generally be visited on any given day.
How the PROFEPA Weekly Lottery System Works
To prevent the top 5 sites from being destroyed by constant daily traffic, the Mexican government, through park rangers and PROFEPA (Federal Attorney for Environmental Protection), operates a mandatory weekly lottery.
Here is exactly how the draw works behind the scenes:
The Bag: At the beginning of the week, rangers place 7 pieces of paper into a bag. Five papers have the names of the top 5 sites, and two papers are completely blank.
The Daily Draw: Every day, one paper is drawn from the bag.
The Result: This means that over the course of the week, there will be 5 days where one of the popular sites is opened, and 2 days where none of the popular sites open at all.
What happens when a site is drawn?
If El Vencedor is drawn on a Tuesday, that site officially opens for the day. However, access is still not guaranteed.
The available spots for that site are then raffled off among the different dive boats, strictly respecting the site’s maximum weekly capacity. If there are more divers wanting to go than available spots, some boats will miss out. Once a site hits its maximum weekly limit of divers, it closes completely for the remainder of the week.
The Jack Fish tornado rules
The massive, swirling schools of Bigeye Jacks are one of the main reasons snorkelers and divers visit the park. Interestingly, the Jack Tornados are not tied to a specific geographical point they move. Therefore, they are not part of the 5 popular lottery sites.
You can technically dive or snorkel with the jacks any day of the week. However, there is one crucial restriction set by CONANP (National Commission of Protected Natural Areas):
The 200-Meter Rule: If the school of jacks happens to be located less than 200 meters away from one of the popular sites (like El Bajo), and that specific site is closed that day, diving with the jacks is strictly prohibited. This rule prevents operators from using the fish as an excuse to bypass the closure of a protected reef.
Why does this system exist? The Logic Behind the Lottery
From a diver’s perspective, this level of unpredictability can be frustrating. Why not just allow people to book spots months in advance until the capacity is full?
While the system is undeniably designed to protect the ecosystem by preventing localized over-diving, it also responds to a powerful economic logic for the local community.
If advance bookings were allowed, the most famous spots (like El Vencedor) would sell out instantly for the entire year. The rest of the dive sites would see very little demand. Consequently, local operators would work fewer days and earn less income.
By using a randomized lottery system, the park forces demand to be distributed evenly. It ensures that:
- All local operators have work every day.
- Divers are forced to explore the entire park, not just the “famous” spots.
- The economic benefits of tourism remain constant and spread out across the community.
Setting the right expectations for your trip
Cabo Pulmo is a breathtaking destination, but the experience is not entirely predictable. Access to apex predators like Bull Sharks or the exact dive site you want depends as much on luck and the weekly draw as it does on planning.
At Mexico Travel Adventure, we believe that an informed diver is a happy diver. We manage all logistics, park permits, and boat assignments to give you the absolute best chances within the legal framework of the park.
👉 To learn more about the dive sites and best seasons, read our Ultimate Cabo Pulmo Diving Guide here.
