Kayaking on Upper Mreznica River – Slunj, Croatia

Waterfalls and paddles, all in one stretch. Kayaking the Upper Mreznica River near Plitvice turns a simple paddle into a nonstop sequence of pools, drops, and canyon fun, including 15 travertine waterfalls you can kayak under, jump from, or even swim beneath. I also like the hands-on setup, since you get neoprene suits if needed and clear paddling guidance before you head out.

The one thing to factor in is timing and group feel. The activity starts with a drive from the base to the river, and if you end up with a larger group, the start can feel slower than it needs to be.

Key things to know before you go

• Up to 15 waterfalls on one run, with different ways to meet them (kayak routes, small slides, and jumping when you want)
• Warm pools between falls, so it is not all adrenaline, you get moments to cool off and reset
• Tandem kayaks and beginner-friendly instruction, which makes the falls less intimidating
• Action-heavy start and finish, with calmer paddling in the middle so you can actually enjoy the canyon
• Guides who watch closely, including Denis, who helps with drops while still letting you try on your own

Waterfall time on the Upper Mreznica, why it feels special

The Upper Mreznica River in the Plitvice Lakes area has a way of turning kayaking into a natural theme park, but without the manufactured vibe. You are paddling through a wild canyon where travertine waterfalls step the river down in stages. The fun part is the variety: some sections invite quick shots in your kayak, other spots are more about riding natural slides or choosing a safer option like walking around a cascade.

You also get a rare benefit for this kind of ride, the warm water pools between waterfalls. That means you can take a breather, cool off without a full cold-water shock, and keep your energy up for the next set of drops. The tour description highlights the highest waterfall at about 8 meters, and the overall feel is active all the way through, from the early water action to a punchy ending.

I like that this is not sold as a long, slow “float.” It is designed as a short, intense outdoor outing with plenty of moments that feel like mini challenges.

Where you start at Kupa Sports, and what you get right away

Your base meeting point is Kupa Sports White Water Adventure, Rafting and Kayaking base Mreznica, in Tounj. This is where you get your safety gear first, then you receive paddling instructions. If the water is cool, you may get neoprene suits, so you are not guessing what you will actually need once you hit the river.

This initial stage matters more than people think. In river kayaking, small movements are everything. Good instructions help you paddle straight, keep balance in the tandem kayak, and understand when to lean, when to brace, and when to just go with the flow. Based on guide feedback shared by multiple participants, the guides tend to be attentive and practical, not just watchful.

If you are worried about your gear, you can relax here. The tour includes the necessary equipment, which reduces the stress of figuring out what you need to rent on your own. It also saves you time, since you can focus on getting ready instead of hunting down the right shop.

The short transfer that sets up the real ride

After the briefing and kitting up, you drive to the river start. Along the way, you may pass waterfalls and sections of the river system, sometimes in ways that look like natural slides. It is a quick repositioning, but it does change your first impression of the day. You will not hop straight into the water right at the base.

That is also where one criticism can come into play. If you are in a larger group or if logistics move a bit slower, the whole outing can feel longer than expected. The tour runs about 3 hours total, so the schedule is built to pack in action efficiently. Still, mentally plan for that early “get there first” stretch.

How the paddling works: action, then calm, then action again

Once you are on the river, the tour is structured so you never feel stuck for too long without either progress or payoff.

• Early section: more action right away. You go through the first drops and surprises, so your confidence builds fast.
• Middle section: calmer paddling. This is your chance to take in the canyon, watch the changing color of the pools, and just enjoy the water around you.
• Final section: more action again. The closing stretch keeps the energy up so you do not finish the tour feeling like the best part happened hours ago.

This rhythm is a big reason beginners can still have a good time. You get time to practice after the first adrenaline hits, instead of being thrown straight into the toughest parts without adaptation.

Up to 15 waterfalls: what you will actually do near them

The Upper Mreznica does not treat every waterfall the same way. The tour description explains that depending on conditions and the specific feature, you might encounter waterfalls by different methods:

• riding some falls down in your kayak
• using natural waterslides created by the river
• jumping into the lower pool in spots that are appropriate for it
• walking around certain cascades when that route makes more sense

The highlight is the repeated encounter with waterfall after waterfall, up to 15 travertine falls during your run. That frequency is what makes this different from a basic kayaking trip where you might see one or two notable drops. Here, you are constantly getting a new view and a new choice.

You also get the chance for a more water-forward experience, since the tour promises moments where you can swim beneath the waterfalls, not just paddle past them. Even if you decide not to swim, the river still brings you right into the spray zone, and that is part of the excitement.

As for how big the waterfalls feel, the tour notes a highest waterfall around 8 meters. You should expect a serious drop somewhere in the mix, but the way the trip is managed keeps it from being reckless. The guides help you time your paddling and decide when to attempt versus when to choose an alternative route.

Swimming, jumping, and waterslide moments (without feeling out of control)

There is a strong adventure streak here, including what the description calls canyoning-style options: riding waterslides and jumping down waterfalls. The key is that this is not forced. The way guides operate, based on participant feedback, is to stay close to your group and offer help when needed, then step back when you can handle it.

One participant described how Denis focused on the group constantly, helping through drops and waterfalls when necessary, while still allowing the group to try things on their own. Another set of comments talked about patience and guidance during rock jumping. You should treat these moments like an invitation, not a checklist.

If you are bringing kids, this matters even more. The tour notes children from age 6 are welcome, and the guide support is part of why families feel comfortable. It is still a river adventure, so you should expect wet conditions and follow safety direction closely.

The scenery between the falls, and the small wildlife bonuses

The most intense part is the waterfalls, no question. But the middle calm section is where you get the “Croatia nature day” feeling instead of constant white-water effort. The river environment includes pools with different colors, and those shifting tones make it easier to enjoy the river even when you are not focused on the next drop.

You may also spot wildlife. One review mentioned turtles and dragonflies around the group. That is not something you can plan on, but it fits the overall feeling of moving through a real natural system rather than a controlled attraction.

If you like photography, this is one of those trips where you do not just shoot landscapes. You are capturing action, spray, and moments near the waterfalls, which are much harder to stage on your own.

Group size, tandem kayaks, and how beginners usually do

This tour caps at a maximum of 20 travelers. That is a healthy number for a guided river activity. It is large enough to feel social, small enough that you are not likely to spend the entire trip waiting for someone else to catch up.

Kayaks can be tandem, which means you paddle with a partner. Multiple reviews mentioned that tandem kayaks were comfortable. For beginners, tandem setup can help because you are not trying to do everything alone while navigating drops. Your partner and the guide’s instruction style can take some pressure off.

Still, beginners should be ready for a learning curve. Even with good instruction, you are moving a boat through a moving river and hitting spots where you need to coordinate timing. The payoff is that once you get it, it is a very satisfying kind of confidence.

Transfers and included value: what you pay for

The price is $65.33 per person for an approximate 3-hour experience. That can look like a simple activity cost, but here is why it tends to feel fair in practice.

Included:

• use of necessary equipment
• all fees and taxes
• local transfers
• licensed guides

Not included:

• lunch
• bottled water
• gratuities (optional)
• transfer to/from attraction
• photos of the tour

So you are paying mostly for the river experience, plus the guide labor, safety setup, and local transportation. If you are staying around the Plitvice area, that local transfer piece reduces hassle. If you are driving in, you may want to plan snacks and water separately because bottled water and lunch are not included.

Also note the tour uses a mobile ticket and is offered in English, so it fits well for visitors who want a straightforward experience.

Planning your day: what to bring and how to stay comfortable

The trip ends back at the meeting point, and you get back to the base where you can change into dry clothes. That is a practical detail, because even in warm conditions, waterfall spray can soak you for real.

I recommend you treat this as a wet activity and pack smart. Bring:

• a swimsuit or quick-dry gear you can wear under your paddling setup
• a towel or at least something quick to dry off with
• water shoes or footwear you can trust around slippery rocks
• dry clothes for after, since you will feel the cold quickly once you stop moving

Some reviews mentioned options like a changing room and a place to rest, plus the ability to buy drinks. You still want to have your own plan for food and water since lunch and bottled water are not included.

Weather matters, and it affects what you feel most

This experience requires good weather. If conditions are poor, it can be canceled, and you will either be offered a different date or a full refund. That matters because a rainy day can change how the river feels, what the guide recommends, and how safe certain sections are.

When the weather cooperates, you get the full value: warm pools, waterfall spray, and the chance to feel connected to the canyon rather than just surviving the ride.

Who should book this Upper Mreznica kayaking tour

You should book if you want:

• a half-day style adventure that is short but high impact
• waterfall action you can experience close up, including kayaking under or jumping near falls
• guided help that keeps it beginner-friendly
• a family outing option (children from 6 welcome) that still feels like real adventure

You might rethink it if:

• you hate wet activities and want mostly dry sightseeing
• you prefer very small groups and are sensitive to pacing
• you are looking for a gentle scenic paddle only

Should you book? My practical take

Yes, if you want a guided kayaking trip where the main event is the waterfalls, not the paddling workout. The price includes equipment, licensed guides, and local transfers, which makes it less hassle than organizing gear and logistics yourself. The tour also has a clear rhythm, more action at the start and end, with calmer paddling in the middle so you can take in the river for real.

If you are a beginner, this is one of those times where joining with a guide beats trying to DIY. The guide support described in feedback, including Denis’s hands-on attention, is the difference between feeling nervous and feeling in control. Just go in expecting a wet, active outing and pack accordingly.

If you want to maximize your enjoyment, arrive ready, listen carefully during the paddling briefing, and take the offer of help without feeling pressured to do every jump or swim option. The best part is that the river gives you multiple ways to experience the waterfalls, and you get to choose your pace.

FAQ

How long is the Kayaking on Upper Mreznica River tour?

It lasts about 3 hours.

Where do we meet and does the tour end there too?

You meet at Kupa Sports – Rafting & Kayaking base Mreznica in Tounj, and the activity ends back at the same meeting point.

Is local transportation included?

Yes, local transfers are included. Transfer to/from your attraction is not included.

What is included in the tour price?

The price includes use of necessary equipment, all fees and taxes, local transfers, and licensed guides.

Are beginners allowed?

Yes, beginners can participate.

Are children allowed, and what is the minimum age?

Children from age 6 are welcome.

What language is the tour offered in?

The tour is offered in English.

What happens if the weather is bad?

This experience requires good weather. If it is canceled due to poor weather, you are offered a different date or a full refund.

What is the cancellation policy?

You can cancel for free up to 24 hours in advance for a full refund. Canceling less than 24 hours before the start time is not refundable.