Kayaking on Upper Mreznica River – Slunj, Croatia

Waterfalls are your route down the river. This three-hour Upper Mreznica kayaking trip near Slunj turns a quiet Croatian river into a natural obstacle course, with up to 15 travertine falls, warm pools, and short bursts of canyoning. I like the mix of calm paddling and active drops, and I like that beginners and children from age six can join.

The other strong point is the practical setup: equipment, safety instruction, licensed guides, and local transport to the river start are included. The main caution is group size, which can reach 20 people, and the base is not right beside the launch point, so the actual river time may feel shorter than the total outing.

The essential facts at a glance

• Up to 15 waterfalls: Paddle over, around, or below a series of travertine cascades, with the highest reaching about 8 meters.
• Warm river pools: The falls create calm pools where you can swim and cool off between active sections.
• Beginner-friendly adventure: Safety equipment and paddling instruction are provided, and children from age six are welcome.
• Near Croatia’s top sights: The base is about 30 minutes from Plitvice Lakes and roughly 1.5 hours from Zagreb.
• A small taste of canyoning: Depending on conditions and your comfort level, you can use natural slides, jump into lower pools, or walk around a fall.
• Good customer rating: The experience is rated 4.9 out of 5, with 98 percent of customers recommending it.

What makes the Mreznica River special

The Mreznica is not a standard flat-water kayaking trip. Its travertine barriers divide the river into a chain of pools, each followed by a small cascade or a more energetic drop. That gives the outing a useful rhythm: paddle quietly, approach a fall, make a choice, then enjoy another stretch of calm water.

The highest waterfall on this route is about 8 meters. That does not mean you will automatically plunge over an 8-meter drop in your kayak. The route includes different ways to pass the falls, and your guide decides what is suitable for the conditions and the group.

Some cascades can be ridden in the kayak. Others may be crossed using a natural waterslide, by jumping into the lower pool, or by walking around the obstacle. You can take part at your own comfort level, which matters when a family group includes both confident swimmers and people trying a kayak for the first time.

I especially like the way this river combines action with stillness. The beginning and end are described as the most active sections, while the middle offers quieter paddling and time to look around. That middle stretch keeps the trip from becoming a nonstop test of nerves.

The water also creates attractive swimming spots. The pools are warm compared with many mountain rivers, making a short swim or splash between falls feel like part of the route rather than an optional extra.

Arriving at Kupa Sports in Tounj

You begin at Kupa Sports, the rafting and kayaking base at Tržić Tounjski 91, 47264 Tounj, Croatia. This is also where the experience ends, so you do not need to arrange a second pickup point after getting off the river.

The local transfer is useful because the base and the river entry point are not necessarily the same place. After you arrive, the staff provides the required equipment and gives you basic paddling and safety instructions. You then travel to the start of the river section.

One practical point deserves attention: the transfer can add time to the overall outing. A customer who enjoyed the kayaking still felt the start point was a long way from the place where the group entered the river. If you are planning a tight day around Plitvice Lakes, allow more than the advertised three hours rather than scheduling your next activity immediately afterward.

The base has a changing area, a place to rest, and drinks available for purchase. Lunch and bottled water are not included, so bring your own water or plan to buy a drink there. Photos are also not part of the package.

Getting ready for the water

At the base, you receive the necessary kayaking equipment. Neoprene suits are available when needed, a useful detail for cooler weather or anyone who expects to spend time in the water.

The safety briefing is aimed at beginners. You receive paddling instructions before the transfer to the starting point, and the guide helps the group understand how to approach the drops. The basic lesson will not turn you into an expert kayaker, but it should give you the simple commands and habits needed for this short route.

Tandem kayaks are used, and one family praised their comfort. Sharing a boat can make the activity easier for a first-timer because you are not handling every movement alone. It also gives parents a way to paddle with a child, although the guide remains the best person to confirm how each boat should be arranged.

The experience is offered in English. A licensed guide leads the group, and the stated maximum is 20 people. That is manageable, but it is not the same as a private trip. If you want more individual coaching at each waterfall, ask about the group size before booking.

The first waterfalls bring the excitement

The opening section gets to the point quickly. Rather than spending the entire trip learning on a broad, slow river, you soon encounter the falls and smaller rapids that make the Mreznica unusual.

Your group may approach each obstacle in several ways. You may paddle down a cascade, slide over smooth rock, jump into the pool below, or walk around the fall. The available choice depends on the route and conditions, and your guide helps you decide what is sensible.

This is where the guide’s role matters most. Denis is praised for watching the group closely, helping people through drops when needed, and stepping back when they were ready to manage a section themselves. That is the right balance for this kind of outing. You want help when the boat points the wrong way, but you do not want every moment managed for you.

Another guide, named Dennis in one account and working with Alex in another, is also described as patient and attentive, including with a child who needed extra care at the falls. The names are spelled slightly differently in the available information, so confirm your guide’s name when you arrive.

The river environment adds more than scenery. Turtles and dragonflies have been spotted along the route, and the changing pools give you something to notice during the quieter sections. This is a nature outing with real activity, not just a floating sightseeing trip.

Quiet paddling between the drops

The middle of the route provides a welcome pause. Here you can paddle at an easier pace, enjoy the differently colored pools, and take in the wooded river corridor without preparing for the next drop every few minutes.

This slower section is important for families and first-time paddlers. You get time to settle into the tandem kayak, adjust your rhythm with your partner, and enjoy the river without feeling rushed. It also gives the guide a chance to keep the group together before the more active sections return.

I would not choose this trip if you want a long, uninterrupted wilderness paddle. The route is built around the waterfalls, and the transport to the launch point reduces the amount of time spent continuously on the river. But if you want several types of activity in one compact outing, the changing pace works well.

The warm pools are also most enjoyable here. You can refresh yourself, float briefly, or simply paddle through the calmer water. Since the river creates natural basins between the falls, the trip feels like a sequence of small outdoor rooms, each with a different mood.

The final section brings more action

The ending returns to the livelier character of the start. By this point, you should have a better feel for the kayak and the guide’s instructions, so the later falls may feel more manageable than the first ones.

You can choose how adventurous to be. Some people will want to ride the drops in the kayak, while others will prefer to jump, use the natural slides, or walk around. The option to adjust your level of participation is one of the strongest features for mixed groups.

The route includes as many as 15 travertine waterfalls, but the exact feel of each one will vary. Some are small and playful, while others require closer attention. Do not assume that every fall is a free-for-all. Listen to the guide, follow the safety instructions, and let the staff decide when a section should be paddled or bypassed.

Once you reach the finish, a short drive takes you back to the base. You can then change into dry clothes before leaving. This is a simple but valuable part of the setup, especially if you have spent much of the trip sliding, swimming, or landing in splashy pools.

How good is the value at $65.33?

At $65.33 per person, this is not the cheapest way to spend three hours in Croatia. But the price covers the equipment, safety gear, possible neoprene suits, local transfers, licensed guides, entrance-related fees, and taxes.

That package makes the price reasonable for someone who would otherwise need to arrange equipment and transport separately. You are paying for access to a route that would be difficult to navigate alone, plus instruction and supervision around the waterfalls.

The value is strongest when you are staying near Plitvice Lakes and want an active day away from the national park paths. The base is about 30 minutes from Plitvice, making the outing a practical addition to a wider Croatian road trip. It is also about 1.5 hours from Zagreb, so it can work as a day outing from the capital, though you should allow time for driving beyond the three-hour activity.

The price does not include lunch, bottled water, gratuities, or photos. Bring water, and do not assume a photo package will document the falls for you. If you want a picture-free day, that is no problem. If you expect professional images, this is worth checking before departure.

Who will enjoy this trip most?

This outing fits families, couples, and active adults who want a guided adventure without needing advanced kayaking skills. The minimum age is six, and the route includes calmer sections, so a family can enjoy the river without every minute requiring athletic effort.

It is also a good choice for people who want to try more than one activity. You are not limited to paddling. The waterfalls allow for swimming, jumping, natural slides, and short canyoning-style moments.

First-time kayakers should feel comfortable asking questions. One first-timer was given clear instruction and patient help, which is exactly what you need before handling the falls. Tandem boats also reduce the pressure of managing the entire kayak alone.

The trip may be less suitable if you want a very small group or private guiding. A maximum of 20 people is stated, and one account found the group much larger than other groups on the river. Larger groups can mean more waiting at the falls and less personal attention, even when the guide is doing a good job.

You should also think about your comfort with water and heights. The activity includes jumps and drops, but participation choices are available. If you prefer not to jump, you may be able to ride the kayak or walk around, depending on the section and the guide’s directions.

Practical tips before you book

Wear clothing that can get wet and bring dry clothes for the end. The base has a changing room, but the activity itself is built around water, so a dry change is more than a minor convenience.

Bring drinking water or money for a drink at the base. Lunch is not provided, and bottled water is specifically excluded. Keep your plan simple and avoid scheduling a meal immediately after the finish unless you have allowed time to change and return from the river.

If you are staying at Plitvice Lakes, check the driving time from your lodging rather than assuming every point in the park is 30 minutes away. The meeting point is in Tounj, at the Kupa Sports base, and you must make your own way there because transfer to and from the attraction is not included.

The activity operates in good weather and requires a minimum number of participants. If poor weather cancels the trip, you can choose another date or receive a full refund. You can also cancel for a full refund up to 24 hours before the start time, but changes or cancellations inside that window are not accepted.

The experience is highly rated at 4.9 out of 5, and 98 percent of customers recommend it. I would treat those numbers as a sign that the core activity is strong, while still paying attention to the group-size concern and the extra transfer time.

Should you book Upper Mreznica kayaking?

I would book this trip if you want a short, active Croatian adventure with waterfalls, swimming, and several ways to test your nerve. The river’s best feature is its variety: peaceful paddling in the middle, action at both ends, and enough flexibility for beginners and confident participants to share the same outing.

I would hesitate only if you need a private-feeling experience, have a very tight schedule, or want a long continuous kayaking route. For families near Plitvice, couples who like a little adrenaline, and first-timers who want a guided introduction, the $65.33 price is fair. Just arrive with dry clothes, extra time, and a willingness to get wet.

FAQ

How long does the Upper Mreznica kayaking experience last?

The activity lasts approximately three hours.

Where does the kayaking trip begin?

It begins at Kupa Sports, Rafting and Kayaking Base Mreznica, Tržić Tounjski 91, 47264 Tounj, Croatia.

Does the experience end at the same place?

Yes. The activity ends back at the Kupa Sports meeting point.

What is included in the price?

The price includes necessary equipment, safety gear, local transfers during the activity, all fees and taxes, and licensed guides.

Are children allowed to participate?

Yes. Children from six years old are welcome, and most participants can take part.

Is the tour offered in English?

Yes. The experience is offered in English.

Is food or bottled water included?

No. Lunch and bottled water are not included. Drinks may be available to buy at the base.

What happens if the weather cancels the trip?

If poor weather causes a cancellation, you can choose a different date or receive a full refund. You can also cancel up to 24 hours before the start time for a full refund.