Kayaking on Upper Mreznica River – Slunj, Croatia

The best part of this Upper Mreznica kayaking trip is the river itself. It tumbles through a wild canyon, forming warm pools below as many as 15 travertine waterfalls. You may paddle over some falls, slide down others, or jump into the pool below.

I like the mix of action and quiet water, and I like that beginners and children from age six can take part. Guides such as Denis, Dennis, and Alex are described as patient and attentive, especially when helping families through the drops. The main caution is group size: the maximum is 20, and a larger group can mean more waiting and less personal attention.

Key points to know before booking

• Up to 15 waterfalls: Paddle, slide, jump, or walk around the cascades, with the tallest waterfall reaching about 8 meters.
• Warm swimming pools: The falls create natural pools that offer a welcome break between active sections.
• Suitable for first-timers: Instruction, safety equipment, and licensed guides are included.
• Family-friendly age limit: Children from six years old are welcome, though the day still includes rapids, jumps, and waterfall descents.
• Meeting point near Tounj: You meet at the Kupa Sports base, about 30 minutes from Plitvice Lakes and roughly 1.5 hours from Zagreb.
• Three hours, including local transfers: The river outing ends back at the base, where you can change into dry clothes.

Why the Upper Mreznica is the real attraction

The Mreznica is not a standard flat-water paddle. Its charm comes from the unusual way the river moves through limestone terrain. Travertine barriers interrupt the current, creating a chain of falls and clear pools rather than one long, uniform run.

That gives you a changing day. One moment you are paddling gently through quiet water, and the next you are lining up a kayak for a small drop. The tallest waterfall on this route is about 8 meters, but not every fall requires a dramatic descent. Depending on the cascade, you may ride over it, use a natural waterslide, jump into the lower pool, or walk around it.

I like that choice. It keeps the outing from becoming a test of nerve at every bend. You can take part in the active sections while still having room to be cautious. The guides help you decide how to handle each fall, and beginners are not expected to arrive with white-water skills.

The setting also rewards looking up from the paddle. The river is lined by a wild canyon, with pools in different shades and small signs of river life. One family noticed turtles and dragonflies along the way, a reminder that this is not only a sports activity. You get a close view of a quieter side of inland Croatia, away from the crowds around the main Plitvice sights.

From the Kupa Sports base to the river

The outing begins at Kupa Sports, at Tržič Tounjski 91 in Tounj. This is the place to allow extra time for meeting the guide, getting organized, and changing into the supplied equipment.

The price includes the necessary kayaking equipment, safety gear, licensed guides, taxes, and the local transfer from the base to the river start. After the river section, a quick drive returns you to the base. This arrangement is useful because you do not need to work out a separate shuttle between the put-in and finish.

It does not include transport from your hotel or from Plitvice Lakes to the meeting point. That distinction matters. If you are staying in the Plitvice area, plan your own ride to Tounj. The stated position is convenient for a day trip, about 30 minutes from Plitvice Lakes, but this is not a hotel pickup service.

Once you arrive, you receive safety equipment and, when needed, a neoprene suit. You then get paddling instructions before being driven to the starting point. The sequence is simple, though one practical criticism is worth keeping in mind: the base and the point where you enter the river are not right beside each other. One participant felt that this added time to the day.

The opening section brings the most action

The early part of the river is described as one of the more active sections. This is where you begin to learn how the kayak responds, how to approach a drop, and how much help you want from the guide.

You may go over small waterfalls and rapids in a tandem kayak. The boats are described as comfortable, and the guides keep an eye on the group while allowing you to manage sections yourself when conditions permit. That balance is important. You get support without feeling that every move is being done for you.

The waterfalls are not all handled in the same way. Some can be ridden directly in the kayak. At others, you may use a natural slide, jump into the pool, or walk around the cascade. If you are taking part with children, make sure everyone understands that the activity includes real water movement and optional jumps, not just a gentle scenic paddle.

Guides Dennis and Denis are specifically praised for staying attentive through the drops and offering help when needed. Alex is also described as patient with a child who needed extra care. Those details matter more here than a polished speech at the start. On a river, a calm guide who watches the group closely is the person you want.

The quiet middle gives you time to look around

The middle section is calmer. After the first run of falls, you get stretches of peaceful paddling through the canyon and around the river pools.

This slower part gives the outing a better rhythm. You are not constantly bracing for the next drop, and you have time to notice the water, rock, plants, and small creatures along the banks. The warm pools are useful here too. They offer a chance to refresh yourself before the more active sections resume.

For me, this contrast is one of the strongest reasons to choose Mreznica instead of a trip made entirely of rapids. You get excitement without giving up the sense of being out in nature. Families can enjoy the fun parts, while adults who want scenery and quiet water still get something from the outing.

Do not expect a long expedition into untouched wilderness. The experience lasts about three hours and is designed as a compact guided activity. Still, the combination of waterfalls, pools, canyon walls, and changing pace makes the time feel varied.

The final section returns to the waterfalls

The action picks up again toward the end. By then, you have had time to get used to the kayak and the guide’s instructions, so the later falls can feel more manageable than the first ones.

You can expect another mix of small drops, rapids, and waterfall passages. The activity does not require you to take every option in the most daring way. If jumping is not for you, the route also allows for paddling over selected falls or walking around a cascade.

That flexibility makes the trip suitable for a mixed group. One person may want to jump, another may prefer the kayak, and a child may need more help. A good guide can keep those different comfort levels together, though a full group may take longer at each decision point.

When you reach the finish, the local transfer takes you back to Kupa Sports. You can change into dry clothes at the base and have a place to rest. Drinks can be purchased there, but lunch and bottled water are not included, so bring or arrange your own refreshments.

What the $65.33 price covers

At $65.33 per person, the value depends on how you use the included services. You are paying for more than boat rental. Equipment, safety gear, neoprene suits when necessary, instruction, licensed guides, river logistics, and the return transfer are all part of the package.

That is a fair setup for someone who wants to arrive, receive instruction, and enjoy a managed river route without arranging separate equipment or shuttle transport. It is also useful if you are new to kayaking and would not feel comfortable choosing a route or handling the waterfalls alone.

The value is less clear if you already own equipment and want a private, small-group outing. The group can reach 20 people, and one account described a group that felt larger than other groups on the river. A bigger party may create pauses at the falls and reduce one-on-one time with the guide.

The price does not include transport to Tounj, meals, bottled water, gratuities, or tour photographs. Add those costs when planning your day. If you are driving from Split, the outing may involve a long trip, although one family made that journey and felt the river justified it. For most people, it fits more naturally into a Plitvice or Zagreb-area plan.

Is it suitable for children and first-time kayakers?

The minimum age is six, and the activity is open to beginners. You do not need to arrive with prior kayaking experience. Instruction is provided before the river section, and the guide helps with the waterfall passages.

That does not mean the outing is passive. You should be comfortable getting wet, paddling, moving through rapids, and being around drops. Jumping and some canyoning-style activities are part of the route, but the supplied information indicates that you may sometimes walk around a cascade or choose a different way through.

Families should tell the guide if a child needs extra help. One guide was especially attentive to a child with Down syndrome, which suggests that the staff can adapt their support when they know what is needed. Still, the tour is not presented as a specially adapted program, so contact the provider ahead of time if your group has specific requirements.

For first-time adults, the route offers a useful introduction to moving water. You can learn basic paddling in calmer stretches, then try small falls with guidance. The only concern is that a large group may mean less time for individual coaching.

Group size can shape the experience

The maximum group size is 20. That is not enormous for an outdoor activity, but it is large enough to affect the pace, especially at the waterfalls.

With a well-managed group, the size can create a lively atmosphere and make the activity comfortable for solo participants or families. You are unlikely to feel isolated. The risk is that the guide must divide attention among many boats, and everyone may wait while the group moves through a narrow or technical section.

The supplied experience gives a mixed picture here. Dennis, Denis, and Alex are praised for being friendly, patient, and attentive, while one participant felt the group was too large and the leader was not engaged enough. That difference may come down to the guide assigned that day and the size of the departure.

If personal coaching is your top priority, ask about expected group size before booking. If you mainly want a guided introduction to the river and do not mind occasional pauses, the maximum of 20 is less troubling.

Practical details for your day

The activity is offered in English, and you receive confirmation when booking. The tour ends where it begins, at Kupa Sports in Tounj, rather than at Plitvice Lakes or another destination.

The duration is about three hours, but allow additional time for arrival, changing, the transfer to the river start, and the return drive from the finish. The exact flow can also depend on group size and river conditions.

Bring dry clothes for after the outing. Neoprene gear may be supplied when necessary, but you should still expect to get wet. Lunch and bottled water are not provided, and photographs are not included, so do not assume there will be a photo package waiting at the end.

The activity depends on good weather and a minimum number of participants. If poor weather cancels it, you are offered another date or a full refund. If the minimum is not met, you receive the choice of another date or experience, or a full refund. You can cancel for a full refund if you do so at least 24 hours before the start time. Changes or cancellations inside that window are not accepted.

Who will enjoy this Mreznica trip most?

This is a strong choice for you if you want several kinds of activity in one short outing:

• You are staying near Plitvice Lakes and want an active day away from the walking trails.
• You are a beginner who wants a guided introduction to moving water.
• You are traveling with children age six or older who enjoy swimming, slides, and optional jumps.
• You like a mix of calm paddling and short bursts of action.
• You want equipment and local river transfers handled for you.

I would think twice if you dislike getting wet, have no interest in rapids or waterfall passages, or want a very small group. I would also check the meeting point carefully if you are relying on public transport, since transport to the attraction is not included and the meeting point is in Tounj.

Should you book Upper Mreznica kayaking?

I would book this trip for the combination of 15 waterfalls, warm pools, and beginner-friendly guidance. It offers more variety than a basic kayak rental and gives you a close look at one of inland Croatia’s most unusual rivers.

Before paying, confirm how many people are expected in your departure and ask which guide will lead it if that matters to you. You should also plan your own transport to Kupa Sports, bring dry clothes and water, and leave room in your schedule for the transfer to and from the river.

Book it if you want an active family outing with real thrills but several ways to take each waterfall. Skip it if your ideal river day is quiet, private, and entirely self-paced.

FAQ

Where does the kayaking tour meet?

You meet at Kupa Sports, the Rafting and Kayaking base Mreznica, at Tržič Tounjski 91, 47264 Tounj, Croatia.

How long does the experience last?

The activity lasts approximately three hours, including the local transfers connected with the river outing.

How many waterfalls will I see?

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

Can beginners and children join?

Yes. Beginners can participate, and children from six years old are welcome.

Is transportation included?

Local transfers between the Kupa Sports base and the river are included. Transport to and from the attraction, including getting to the meeting point, is not included.

What happens if the weather is poor?

If the experience is canceled because of poor weather, you are offered a different date or a full refund. You can also cancel for a full refund up to 24 hours before the start time.