What It Was Like to Explore Río Secreto
We drove an hour from Cancun for an adventure combining mountain biking, hiking and swimming through a cave in complete darkness—and it became our favorite excursion of the honeymoon.
Of all the adventures we tried during our Cancun honeymoon, Río Secreto was our favorite.
That is saying something.
During the same trip, we drove a small speedboat through the mangroves, went snorkeling, parasailed together and traveled approximately 15 feet underwater on BOB sub scooters.
Río Secreto stood out from all of them.
The experience combined an easygoing mountain-bike ride, a hike through the reserve and a journey into an underground cave system filled with clear water and extraordinary geological formations.
At one point, everyone turned off their helmet lights.
The darkness was so complete that I couldn’t see my hand in front of my face.
Our 2019 Río Secreto Tour
We visited Río Secreto in January 2019. Nearly eight years later, tour names, itineraries and prices have changed.
I no longer have our original booking confirmation, and the experience we remember does not correspond perfectly with the tours currently described on Río Secreto’s website. Rather than apply a current package name to an older experience, I’ll simply describe what we did.
Our tour cost approximately $100 per person and included:
An easygoing mountain-bike ride
Hiking through the reserve
A guided underground cave experience
Wetsuits
Life jackets
Helmets with lights
Swimming and walking through the underground water
Towels
A regional buffet
Nonalcoholic drinks
We also purchased the professional photo package for an additional charge of $99.
Travelers planning a visit today should review Río Secreto’s current tours, inclusions and prices rather than assuming that the 2019 experience described here remains available under the same name.
We Booked Directly and Drove Ourselves
We arranged the experience directly with Río Secreto rather than using the resort excursion desk or a third-party booking site.
Our phones worked in Mexico, so we simply contacted the operator ourselves. We followed the same approach with the other excursions we booked during the honeymoon.
Because we had rented a car using credit-card points, we chose the option without transportation and drove ourselves from Sandos Cancun.
The trip took approximately one hour.
Driving gave us control over our schedule and eliminated the need to wait for a shared resort transfer. It also allowed us to incorporate Río Secreto into a day beyond the resort rather than treating it as a tightly managed hotel excursion.
That independence was one of the main reasons renting a car worked so well for our travel style.
Getting Ready to Go Underground
Río Secreto provided the specialized equipment we needed, including wetsuits, life jackets and helmets equipped with lights.
The wetsuit served a practical purpose. The underground water was cool, although neither of us found it painfully cold.
The helmet light would become our primary connection to the cave around us. In the illuminated areas, we could see the formations, water and other members of the group. Beyond the reach of those lights, the cave disappeared into darkness.
We brought our own camera, but photographing an underground water experience presents obvious challenges. Water, darkness and uneven cave surfaces are not ideal conditions for casually handling a camera.
We ultimately purchased Río Secreto’s professional photo package as well. It was an additional expense, but those photographs captured parts of the experience that would have been difficult for us to document ourselves.
Years later, I’m glad we bought them.
The Mountain-Bike Ride Was Easygoing
Our journey began on mountain bikes.
The biking was easygoing rather than physically demanding. You didn’t need to be a serious cyclist or arrive in exceptional condition to handle the route we followed.
The ride helped create a sense of traveling deeper into the reserve. Instead of stepping off a tour bus directly beside the cave entrance, we were moving through the landscape under our own power.
After the bike ride, we continued on foot toward the cave.
The return followed the same basic pattern in reverse: swim out, hike back and then return on the bikes.
That return bike ride included one unexpected moment when Gina took a tumble.
Fortunately, she wasn’t injured. It became another small part of the story rather than something that spoiled the experience.
Hiking Toward the Cave
After leaving the bikes, we continued on foot.
This transition from biking to hiking made the experience feel like an actual journey rather than a single attraction. Each stage moved us farther from the ordinary world and closer to the underground river.
Our group had approximately 15 people, as best as I remember, along with the guides.
Group sizes and tour formats may have changed since 2019, but the guides were essential to the experience. This was not somewhere we would have attempted to explore independently.
They led us through the route, helped us navigate the water and formations, and made sure the group remained together underground.
Entering the Underground Water
The cave experience involved a combination of walking, wading, floating and swimming.
Some areas were shallow enough to move through on foot. In others, the water became deep enough for us to float or swim with the assistance of our life jackets.
The water was remarkably clear.
Our helmet lamps illuminated sections of the cave as we moved, revealing rock formations above, beside and sometimes beneath us. Stalactites descended from the ceiling while other formations rose from the cave floor.
The setting felt completely separated from the bright Caribbean beaches and resort pools we had left behind in Cancun.
This was cool freshwater, natural stone and darkness.
Even though we were traveling with a group and specialized guide, the environment felt remote and otherworldly.
When Everyone Turned Off the Lights
The most memorable moment required everyone to stop.
The guides had us turn off our helmet lights.
Instantly, the cave disappeared.
This wasn’t the kind of darkness you experience in a bedroom at night, where light still works its way around a door or through a window. There was no distant glow, no visible exit and no opportunity for our eyes to adjust.
I held my hand in front of my face and couldn’t see it.
For a brief time, the only evidence that the rest of the group was still there came from the sound of voices, breathing and movement in the water.
Then the lights came back on.
The cave formations, water and people around us reappeared all at once.
That simple moment communicated the scale and isolation of the underground environment better than any explanation could have. We weren’t merely visiting a dimly lit attraction. We were inside a natural cave system where our small helmet lamps were the only source of light.
Then We Had to Reverse the Journey
Swimming through the cave was not the end of the excursion.
We had to make our way back out, hike to the bikes and ride back through the reserve.
That reverse journey was part of what made the day satisfying. We had traveled into Río Secreto through a sequence of activities, and we had to retrace that route to return.
The biking and hiking weren’t especially difficult for us, but the combination created a more active experience than simply walking through a commercial cave on a paved path.
By the time we returned, changed and sat down to eat, it felt as though we had completed something.
The regional buffet and drinks were included in our tour. After biking, hiking and swimming, having food waiting was welcome.
Was the Professional Photo Package Worth It?
We paid extra for the professional photographs.
At many attractions, photo packages can feel like an expensive afterthought. The pictures are taken because visitors are discouraged from using their own cameras—or because the environment makes personal photography impractical—and then sold at a premium.
Río Secreto was one of the occasions when the extra purchase made sense for us.
We had our own camera, but professional photographers were better positioned to capture us inside the cave. They had the appropriate equipment, understood the lighting and knew where the strongest photographs could be made without interrupting the tour.
Those images preserved parts of the experience that neither of us could have photographed while swimming through the underground water.
The photo package increased the cost of the excursion, but nearly eight years later, we still have the photographs.
That is meaningful value.
How Physically Demanding Was It?
Our experience was active, but we didn’t find it excessively strenuous.
The mountain biking was easygoing. The hiking was manageable, and the life jackets helped during the swimming portions.
Still, this was not a completely passive excursion.
Visitors needed to:
Ride a bicycle
Walk across natural and potentially uneven ground
Enter cool underground water
Move through areas with limited light
Wear a wetsuit, helmet and flotation gear
Be comfortable floating or swimming inside a cave
Complete the return hike and bike ride
Someone uncomfortable with enclosed spaces, darkness or natural cave environments may find the experience more challenging than we did.
The complete darkness was fascinating to us, but I can understand how it could be unsettling for someone with claustrophobia or a strong fear of being underground.
Tour formats and accessibility may have changed, so current visitors should discuss any mobility, swimming or medical concerns directly with Río Secreto before booking.
Was Río Secreto Worth It?
For us, absolutely.
At approximately $100 per person, plus the additional photo package and the cost of reaching the reserve, it was not the least expensive excursion of our honeymoon.
It was the best one.
Río Secreto combined activity, natural beauty and an experience neither of us could easily recreate somewhere else. The bike ride and hike built anticipation. The underground water felt completely removed from the resort environment. Turning off the lights created a moment we still remember vividly.
The photographs helped preserve it, but the strongest memory isn’t a picture.
It is the moment the lights went out and the entire cave vanished.
What We Would Tell Someone Planning a Visit Today
Our experience took place in January 2019. Tour names, routes, group sizes, activities and prices can change considerably over nearly eight years.
If you are considering Río Secreto now:
Read the description of each current tour carefully
Choose based on the included activities, not just the package name
Confirm whether transportation is included
Compare the transportation price with driving yourself
Ask about physical requirements
Verify current camera policies
Budget separately for professional photographs
Bring appropriate footwear and dry clothing
Allow enough time for the drive from Cancun
Confirm the cancellation policy directly with the operator
We booked directly, drove ourselves and enjoyed the independence that gave us. Someone who doesn’t want to drive in Mexico may find the transportation-inclusive option more relaxing.
Neither choice is automatically better. The right one depends on how independently you prefer to travel.
The Bottom Line
We went to Río Secreto expecting an interesting excursion away from our Cancun resort.
It became the best adventure of our honeymoon.
We rode mountain bikes through the reserve, continued on foot and entered an underground world of clear water, ancient formations and complete darkness. Then we reversed the entire journey to get back out—with one minor bicycle tumble but no injuries.
The tour cost approximately $100 per person in 2019, and we paid more for the professional photographs. It required an hour-long drive from Sandos Cancun in each direction.
We would do it again.
Cancun gave us beautiful beaches, poolside margaritas and the convenience of an all-inclusive resort. Río Secreto gave us something completely different: an experience that required participation, curiosity and a willingness to turn off the lights.
Nearly eight years later, it remains the part of the honeymoon we remember as our favorite.