Kayaking on Upper Mreznica River – Slunj, Croatia

The best part of this Mreznica trip is the river itself: a narrow, wild canyon stitched together by up to 15 waterfalls. You paddle through clear pools, slide over some cascades, and sometimes jump or walk around the higher drops. The water collects in warm basins, so this is as much a swimming and canyoning outing as a kayak trip.

I like the beginner-friendly setup, with equipment, safety instruction, licensed guides, and local transport included. I also like the changing pace: the start and finish bring the action, while the middle gives you quiet water, colorful pools, turtles, dragonflies, and time to enjoy the trees and rock walls. The main thing to consider is group size. The advertised maximum is 20, but a larger group can mean more waiting at waterfalls and less personal attention.

Key points at a glance

• Ride through up to 15 waterfalls: Some cascades are suitable for kayaks, while others involve a natural waterslide, a jump, or a short walk around the drop.
• Warm pools make swimming easy: The river forms calm basins between waterfalls, giving you regular chances to cool off and float.
• Good for first-time paddlers: You receive safety gear and basic paddling instruction before heading to the river.
• A practical base near major sights: Kupa Sports is about 1.5 hours from Zagreb and roughly 30 minutes from Plitvice Lakes National Park.
• The group can reach 20 people: Ask about expected group size if quiet guiding and quick turns at the falls matter to you.
• Children from age six can join: The activity is designed for a broad range of participants, though the water sections still require comfort with outdoor activity.

The Mreznica River is the real attraction

The Upper Mreznica is not a standard flat-water paddle. Travertine barriers break the river into a chain of pools, small rapids, and waterfalls. The highest drop on this route reaches about 8 meters, though the activity uses different ways to handle each cascade.

That variety gives the trip its character. You may paddle below one waterfall, ride another like a waterslide, and walk around a third. At selected spots, you can jump into the lower pool. The guide decides how each section is handled based on the water and the group.

I like this format because it avoids the dull stretch that can spoil a short outdoor tour. You are not paddling hard for three straight hours, but you are also not spending the whole time drifting. The river keeps changing.

The pools between the falls are especially useful on a warm day. They offer a place to swim and catch your breath before the next drop. The water is described as warm enough for comfortable refreshment, and neoprene suits are available when needed.

Starting at Kupa Sports near Tounj

The meeting point is Kupa Sports, at Tržić Tounjski 91 in Tounj. This is the practical base for the day, not a meeting point inside Plitvice Lakes National Park itself. If you are staying near Plitvice, allow roughly 30 minutes to reach the base. From Zagreb, the drive takes about 1.5 hours.

At the base, you receive the necessary safety equipment and paddling instructions. Neoprene suits are provided if conditions call for them. You can also change into dry clothes at the end, which is a small but valuable detail after a wet river trip.

The activity includes the local transfer from the base to the starting point on the river. That saves you from trying to work out a one-way vehicle arrangement, especially since the finish is not simply the same place where you put in.

Bring suitable swimwear and a towel, since you will likely get wet. Bottled water and lunch are not included, so plan those separately. Drinks may be available at the base, but you should not count on the tour price covering food or water.

The first stretch brings the most action

After your equipment fitting and briefing, the group is driven to the launch point. The start of the river section is active, with rapids and early waterfall passages setting the tone quickly.

Your guide explains how to handle the kayak and how to approach the falls. The goal is not expert technique. Beginners can take part, and the guides help you through the drops when needed. Tandem kayaks are used, giving couples, friends, and families a shared boat and an extra pair of hands for paddling.

This is where calm communication matters. Listen closely to the instructions before each waterfall, keep your kayak pointed as directed, and avoid treating the drop like a free-for-all. The guides are there to help you judge which sections are suitable for riding and which require another route.

The guide team has included Denis, also spelled Dennis in some tour information, with Alex assisting on at least some departures. Denis has been praised for staying alert to the group, helping at drops when necessary, and allowing confident paddlers to handle easier sections independently. That balance is useful: you get support without feeling managed at every stroke.

The middle section slows the pace

After the early excitement, the river settles into a quieter stretch. This is a good part of the trip to stop worrying about your paddle technique and look around.

The canyon is marked by differently colored pools, rock formations, and dense natural surroundings. Turtles and dragonflies may appear along the banks and water. You might also see the river’s travertine formations more clearly here, since the gentler pace gives you time to notice how the falls divide the water into separate basins.

This calm section helps make the tour suitable for families. Children from age six are welcome, and the rhythm is not nonstop adrenaline. Still, you should remember that the overall activity remains physical. You will paddle, climb in and out of the kayak, swim at selected points, and manage wet rocks near the falls.

The quiet middle is also where a large group can become noticeable. If everyone spreads out, the river feels peaceful. If the group bunches up at each cascade, you may spend time waiting for boats ahead to clear the drop.

Waterfalls, slides, jumps, and walkarounds

The tour passes as many as 15 travertine waterfalls. That does not mean you ride all 15 in the same way. The river and the conditions determine the method.

Some falls can be paddled directly in the kayak. Others are handled by sliding down a natural water chute, jumping into the lower pool, or walking around the cascade. You can take part in the options that suit your comfort level, but the guide controls the safe route.

This is the section where the trip feels closest to canyoning. You are not simply sitting in a boat. You may be climbing over rocks, stepping into pools, or lining up for a short jump. The highest waterfall is about 8 meters, so ask the guide about the route before committing to any jump. You do not need to prove anything. Walking around a drop is part of the planned experience.

A patient guide makes a real difference here. One family described receiving extra care for a child with Down syndrome, especially around the waterfalls. That detail suggests the activity can work well for mixed-ability families when you communicate your needs clearly before starting.

The final section finishes with another burst of energy

The end of the route returns to a more active rhythm. Expect more rapids, drops, and waterfall passages before reaching the finish.

By this point, you will have learned how the kayak reacts and how to work with your partner. The final section can feel more relaxed because the basic movements are familiar. You still need to pay attention, especially near rocks and drops, but the guide’s earlier instructions should make the route easier to follow.

Once you reach the finish, a short drive takes you back to the base. You can change into dry clothes there before leaving. The activity ends back at Kupa Sports, which makes the logistics simple if you arrived in your own car.

The full experience lasts about three hours, including the practical parts of gearing up, transport, and changing. Do not read that as three uninterrupted hours of paddling. The actual river time includes instructions, stops, waterfall handling, swimming, and regrouping.

What the $65.33 price covers

At $65.33 per person, this is a reasonable price for a guided outdoor activity that includes equipment, safety gear, local transfers, taxes, and licensed guides.

The included transport is important. You do not need to organize a second car at the river finish, and the operator handles the short transfer from the base to the launch point. Equipment can also be costly and awkward to carry if you are traveling around Croatia, so having kayaks and safety gear ready adds real value.

The price does not include lunch, bottled water, gratuities, or photos. If you want a record of the waterfall rides, you may need to arrange photography separately. Keep your phone secure and do not assume you can use it freely near the river.

The value depends partly on the group. With a small group and an attentive guide, you receive more help at the falls and spend less time waiting. With a group close to the maximum of 20, the price still covers the same equipment and transport, but the personal feel may be weaker.

Who will enjoy this river trip most

I would choose this for couples, families, and first-time kayakers who want a lively outdoor day without booking a technical white-water expedition. You get instruction, shared kayaks, and several ways to handle the falls.

It is also a strong add-on to a Plitvice Lakes visit. The base is roughly 30 minutes from the national park, so you can place the activity into a wider Croatia itinerary. Just avoid cramming it into a day when you also expect to see all of Plitvice at a rushed pace.

Families should think about each child’s comfort with cold water, wet rocks, and jumps. Children from age six are accepted, but age alone does not tell you how a child will manage a three-hour river outing. Tell the operator about any needs before arrival.

Strong swimmers will have more freedom in the pools, but the activity is not described as requiring advanced kayaking or swimming skills. Most participants can take part. The key is being ready for an active, wet experience rather than a gentle sightseeing cruise.

Group size, guiding, and the main drawback

The stated maximum is 20 people. That is manageable for an organized river operation, but it is not an intimate private outing.

A larger group may slow the route at popular waterfalls. You may wait while boats move through a drop, and a guide may have less time for individual coaching. One departure was described as having a group much larger than nearby operators, along with a longer-than-expected transfer from the base to the river. That points to the main question you should ask before booking: how many people are scheduled for your date, and how long is the actual river section?

The guide experience can also vary. Denis has been singled out for being attentive, patient, and willing to help without taking over. Another departure felt less engaged, showing why the guide and group can shape the day as much as the river itself.

The high overall satisfaction rate, 4.9 out of 5 from 178 ratings and a 98 percent recommendation rate, suggests the usual experience is very strong. Still, those numbers should not make you ignore the practical downside of a potentially large group.

Booking and weather details

This experience is often reserved about 22 days ahead, so book early if you have only a narrow window near Plitvice or Zagreb. Confirmation is provided when you book, and the ticket is mobile.

The activity requires suitable weather. If poor weather forces cancellation, you can receive another date or a full refund. A minimum number of participants is also required, and if that minimum is not reached, you are offered a different date or experience, or a full refund.

You can cancel for a full refund up to 24 hours before the start time. Changes or cancellations inside that 24-hour window are not accepted for a refund, with cut-off times based on local time.

Should you book the Upper Mreznica kayaking tour?

Book it if you want Croatia scenery with some real action, especially if you are near Plitvice or Zagreb and like the idea of paddling, swimming, sliding, and jumping in one outing. The combination of warm pools and repeated waterfalls gives the trip more variety than a basic kayak rental.

I would be more cautious if you want a quiet, private experience or dislike waiting at busy activity points. Ask about the expected group size and guide before paying. For families, mention children and any special needs in advance so the team can prepare.

For most active visitors, the equipment, transport, instruction, and three-hour route make $65.33 fair value. The Mreznica is the reason to go, while the size and organization of your departure will decide how polished the day feels.

FAQ

Where does the kayaking tour meet?

The tour meets at Kupa Sports, Kupa Sports White Water Adventure, at Tržić Tounjski 91, 47264 Tounj, Croatia.

Where does the activity finish?

The activity ends back at the Kupa Sports meeting point.

How long does the experience last?

The experience lasts approximately three hours, including preparation, local transport, the river route, and returning to the base.

How far is the base from Plitvice Lakes?

The base is approximately 30 minutes from Plitvice Lakes National Park.

How far is the base from Zagreb?

The base is approximately 1.5 hours from Zagreb.

Are beginners allowed to participate?

Yes. Beginners can participate, and paddling instructions are provided before the river section.

What age children can join?

Children from age six are welcome to participate.

What is included in the price?

The price includes necessary equipment, safety gear, all fees and taxes, local transfers, and licensed guides. Lunch, bottled water, gratuities, photos, and transport to and from the attraction are not included.