Kayaking on Upper Mreznica River – Slunj, Croatia

The Upper Mreznica is not a quiet float trip. You paddle through a wild limestone canyon, then meet one small waterfall after another, using your kayak, a natural waterslide, or your own two feet to get past the drops. The highest falls reach about 8 meters, but the river’s warm pools make the whole outing feel playful rather than punishing.

I like the mix of calm paddling and short bursts of action, which gives you time to enjoy the wooded river before the next cascade arrives. I also like that beginners and children from age six can join, with equipment, instruction, guides, and local transport from the base included.

The main point to consider is the group size, which can reach 20 people. One past outing felt crowded, and the launch point was a long drive from the base, so the actual time on the water may feel shorter than the three-hour activity window suggests.

Key points to know before booking

• Up to 15 waterfalls: Paddle over, around, or beside a string of travertine cascades, with the biggest drop reaching about 8 meters.
• Warm natural pools: The river forms pools between the falls that are suitable for swimming and cooling off.
• Beginner-friendly format: You receive a safety briefing, paddling instruction, and the necessary gear before heading to the river.
• Three hours near Plitvice: The base is in Tounj, roughly 30 minutes from Plitvice Lakes and about 1.5 hours from Zagreb.
• Active but not nonstop: The beginning and end are the most exciting, while the middle section offers gentler paddling.
• Local transport included: Kupa Sports drives you from its base to the starting point and returns you after the finish, but you must arrange your own way to the base.

A waterfall-filled alternative to Plitvice Lakes

If you are visiting Plitvice Lakes, this trip gives you a very different way to experience Croatian water. Plitvice is about paths, viewpoints, boardwalks, and carefully managed access. The Mreznica feels more hands-on. You sit in a kayak, steer through moving water, and make decisions at each low cascade.

The river flows through a limestone canyon shaped by travertine, the same type of mineral formation that helps create waterfalls and pools in this part of Croatia. Here, those formations are not just something to photograph from a path. You can paddle over some of them, slide down others, or walk around when that makes better sense.

The setting is one of the strongest parts of the outing. You pass differently coloured pools, wooded banks, and quiet stretches where the only task is keeping your kayak moving in the right direction. Turtles and dragonflies may appear along the river, adding to the feeling that you are far from a city, even though Zagreb and Plitvice are both within reach.

What happens at the Tounj base

You begin at Kupa Sports, the rafting and kayaking base at Tržič Tounjski 91 in Tounj. This is both the meeting point and the end point, so you do not need to arrange a second pickup after the activity.

At the base, you receive the necessary safety equipment. Neoprene suits are available when needed, which matters because river water can feel cool even when the air is warm. You should still bring a swimsuit and dry clothes for afterward, since the activity ends with time to change back at the base.

Your guide gives basic paddling and safety instructions before the group leaves. This is important if you have never handled a kayak. The trip is not reserved for experienced paddlers, and past outings included first-time kayakers who received help with questions and river technique.

The staff then drives the group to the river’s starting point. This transfer is included in the price, but the trip to Kupa Sports is not. If you are coming from Plitvice, allow time for the drive to Tounj rather than assuming the activity begins inside the national park.

The opening section brings the action quickly

The start of the river run is active. You begin encountering rapids and waterfalls early, so you do not spend the whole outing waiting for the interesting part.

At each cascade, your guide explains the best way through. Some falls can be ridden in the kayak. Others are better handled by walking around the drop, using a natural waterslide, or jumping into the lower pool. The choice depends on the particular waterfall and the conditions on the day.

This is where guide attention matters most. Denis received especially strong praise for watching the group closely and stepping in when help was needed, while still allowing confident paddlers to manage the drops themselves. Alex has also helped guide family groups. That balance is useful: you get instruction without feeling that every move is controlled for you.

You should expect some splashing and the possibility of tipping or getting wet. The supplied safety gear and guide support make the activity suitable for beginners, but this is still an active river outing, not a sightseeing cruise.

Fifteen travertine waterfalls shape the middle of the trip

The route includes as many as 15 travertine waterfalls. They are not all major drops. Some are small, playful features, while others require a more careful choice of route.

The variety keeps the outing from becoming repetitive. You might paddle over one fall, carry or walk around the next, then use a smooth rock slide at another. At some points, you can jump from a low ledge into the pool below. The activity description allows for canyoning-style elements, but you can expect the guide to determine what is suitable for the group and the water conditions.

The middle section is calmer. This break is welcome because it lets you look around instead of concentrating only on the next rapid. You can paddle quietly through the canyon, notice the changing colours of the pools, and recover before the final series of obstacles.

I consider this slower portion an important part of the value. A three-hour water activity made entirely of drops and rapids would be tiring, especially for children and first-time paddlers. The quiet stretch gives you a chance to enjoy the river itself.

The final stretch brings back the excitement

The end of the route returns to a more active rhythm. By this point, you have had time to learn how the kayak responds, so the later waterfalls can feel more manageable than the opening ones.

Your guide may help with positioning and steering at the drops. You might also choose to leave the kayak and pass a waterfall by another route. Families can take part, but children need to follow the guide’s instructions and be comfortable with water, movement, and the required safety gear.

The trip ends at the river finish, followed by a short drive back to the Kupa Sports base. There, you can change into dry clothing and rest. Drinks may be available for purchase at the base, but lunch and bottled water are not part of the tour, so plan accordingly.

Photos are also not included. If you want pictures, ask the operator what options are available before setting off. The supplied details do not promise a photography service.

How challenging is the kayaking?

The tour is designed for beginners, and most people can take part. You do not need advanced white-water experience, but you do need to be ready for physical activity, splashing, paddling, and getting in or out of the kayak near waterfalls.

The activity welcomes children from age six. That makes it a practical choice for families who want more action than a standard nature walk. Still, age alone does not tell you how a child will handle the trip. A child who is nervous around moving water may find the falls intense, while an adventurous child may love the slides and jumps.

Tandem kayaks are used, and one past family outing found them comfortable. Sharing a boat can help first-time paddlers because you are not managing the kayak alone. It also means you and your partner need to coordinate your strokes, especially near a waterfall.

You should be reasonably comfortable being outdoors and getting wet. The guides can help with the river route, but the trip is not a good fit if you want a dry, passive activity.

The guide can make or break the experience

The strongest outings depend on an attentive guide. Denis is specifically praised for staying alert to the group, offering help at difficult drops, and giving stronger paddlers room to try the route independently. Alex has also been described as patient and supportive with families.

That kind of guiding is particularly valuable on the Mreznica because the route changes from one feature to the next. You need clear directions about when to paddle, when to steer, and when to leave the kayak. A good guide also helps keep the group moving without making less experienced people feel rushed.

The group limit is 20 people. That is not enormous, but it can feel large on a narrow river, especially when several kayaks reach the same waterfall at once. One past experience felt more crowded than other groups on the river, and the guide seemed less engaged. This is the clearest weakness to keep in mind.

The actual group size may be smaller on your date. If having a quieter outing is important to you, ask Kupa Sports about the expected number of participants before booking.

Is $65.33 good value?

At $65.33 per person, the price covers roughly three hours of activity, the kayak and safety equipment, any needed fees and taxes, licensed guides, and the local transfer to and from the river. That is a fair package for an active excursion, especially because you do not need to rent equipment separately or work out transport to the launch point.

The price does not cover your travel to Tounj, lunch, bottled water, gratuities, or photos. These exclusions are easy to manage, but they affect the final cost. Bring water and food for before or after the outing, and arrive with your own transport plan.

Value also depends on what kind of day you want. If you are comparing this with a standard sightseeing stop, the price is higher than a simple walk. You are paying for instruction, gear, river access, and a guided activity with several distinct sections. If you want to paddle waterfalls and swim in river pools, the package makes sense. If you mainly want to see the Mreznica from the bank, it is more than you need.

The activity is often booked about 22 days in advance. That suggests planning ahead during busy periods, particularly if you need a specific date for a wider Croatia itinerary.

Getting there from Zagreb or Plitvice

The experience is promoted as about 1.5 hours from Zagreb and 30 minutes from Plitvice Lakes. The meeting point is not at the Plitvice park entrance, so check your route carefully and allow enough time to reach Tounj.

The included local transfer begins after you arrive at Kupa Sports. You are driven to the river start and brought back to the base after finishing. The activity ends where it starts, which is helpful if you are driving and have left luggage or dry clothing in your vehicle.

If you are planning this between other sightseeing stops, remember that the advertised duration is approximately three hours, not necessarily the full door-to-door time. The transfer to the river, safety briefing, changing time, and return drive all form part of the outing.

Who should book this river adventure?

I would recommend it to families with active children, couples looking for a break from museums and viewpoints, and first-time paddlers who want a guided introduction to moving water. It also suits anyone staying near Plitvice who wants to see a wilder, less structured side of the region.

You should book it if the idea of riding small waterfalls, swimming in warm pools, and making occasional jumps sounds fun. You should be prepared to get wet and to share the river with a group.

I would hesitate if you dislike group activities, want a small private trip, or are uncomfortable with changing plans at waterfalls. The company has a maximum of 20 people, and the amount of time spent waiting at a feature may depend on the group.

The cancellation terms are reasonable: you can cancel for a full refund up to 24 hours before the start time. Poor weather or failure to reach the minimum number of participants can also lead to a new date or a full refund.

Should you book kayaking on the Upper Mreznica?

Yes, if you want a hands-on river day near Plitvice rather than another scenic walk. The combination of 15 waterfalls, warm pools, natural slides, and quiet paddling gives the outing real variety, and the supplied gear and guide support keep the barrier to entry low.

Book with realistic expectations about group size and transport time. Ask about the expected group before paying if personal attention matters to you, and bring dry clothes, drinking water, and a plan for reaching Tounj. For families and beginners who want a lively Croatian outdoor experience, this is a strong choice.

FAQ

Where does the kayaking tour begin?

The activity begins at Kupa Sports, Rafting and Kayaking base Mreznica, at Tržič Tounjski 91, 47264 Tounj, Croatia.

Where does the activity end?

It ends back at the Kupa Sports meeting point after the river trip and return transfer.

How long does the experience last?

The kayaking experience lasts approximately three hours.

How many waterfalls will I encounter?

The route includes up to 15 travertine waterfalls. The highest waterfall is about 8 meters.

Can beginners take part?

Yes. Beginners can participate, and paddling instructions are provided before you go to the river.

What is the minimum age?

Children from age six are welcome to join.

Is equipment included?

Yes. Necessary equipment, safety gear, and neoprene suits when needed are provided.

Is transportation included?

Local transfers from the Kupa Sports base to the river start and back after the finish are included. Transport to and from the base is not included.

What happens if the weather is poor?

If poor weather causes the activity to be canceled, you will be offered a different date or a full refund.