Fifteen waterfalls, one river ride. Kayaking on the Upper Mreznica River in Slunj is a fast, scenic way to see why this part of Croatia feels so special, with warm pools and drops that can go up to an 8m height. I especially like the hands-on guidance from Dennis (with support from Alex) and the fact that local transfers help you skip the hassle of figuring out the logistics on your own.

For a few people, the only real drawback is the pacing and group feel. One review called out a bigger-than-ideal group size, and another mentioned that the start point can be a long way from where you actually launch, which can make the trip run longer than you expected.

Key highlights worth your time

• 15 travertine waterfalls on one connected kayaking route near Slunj
• Warm-water pools between falls that make swimming and splashing feel natural
• Beginner-friendly setup, including safety gear and paddle instructions before you start
• Pick-your-intensity options as you go (ride in the kayak, jump, or walk around certain cascades)
• Action-heavy start and finish, with more relaxed paddling in the middle

Upper Mreznica kayaking: what it feels like on the water

This is river kayaking in a wild canyon, not a calm-lake paddle. The Mreznica River is famous for its travertine waterfalls, and the route strings together drop after drop so you get that constant “something is happening” feeling.

What I like most for your first (or repeat) time is the mix: action at the start, more relaxed paddling in the middle, then the payoff again near the end. Between waterfalls, the river forms pools of warm water that turn every stop into a chance to cool off, splash around, and reset before the next drop.

And yes, the height can reach 8m, so you’re not just gliding over tiny ripples. Some sections include waterslide-style flows, and the guide may show you where it’s possible to jump or go through cascades in your kayak.

Kupa Sports base in Tounj: gear, instructions, then the drive

Your experience kicks off at the Kupa Sports White Water Adventure base (Kupa Sports – Rafting & Kayaking base Mreznica) in the Tounj area, with an end back at the same meeting point. You arrive, get your safety gear, and get paddling instructions before you’re moved to the start of the river section.

If it’s chilly, you’ll be given neoprene suits if needed. That matters more than people think, because you want to focus on the river, not on being cold or uncomfortable halfway through.

Then comes the part that you’ll want to plan for: you don’t just walk straight from the base to your launch point. You’ll drive to the start, and that’s part of why the overall experience can feel like it stretches when a group is larger or when the transfer distance is longer. Still, the trade-off is that you don’t have to solve transport yourself.

The 15 travertine waterfalls run: how the route is paced

This trip is built around the 15 travertine waterfalls along the Upper Mreznica. You’ll see different kinds of features on the way, not just one repeated style of drop.

The flow of the day typically works like this:

• Early on, the river gives you quicker action—small falls, drops, and rapids that get you awake fast
• In the middle section, you get more peaceful paddling so you can enjoy the river’s changing colors and the surrounding canyon
• Near the end, the route ramps back up again with more thrilling moments

You’re not watching someone else do all the fun either. The tour is designed so you can participate through most of the route, with the guide guiding you through what’s possible at each waterfall—riding in the kayak for many sections, and sometimes using natural routes around a cascade.

Natural waterslides, warm pools, and canyon-style moments

Mreznica is one of those rivers where the water itself seems to invite you to play. Between falls, you’ll find pools that are described as warm, which is exactly why swimming feels doable instead of “cold shock and regret.”

You may also ride natural waterslides, and there can be moments where you jump into lower pools or go around a cascade on foot. The key idea is options: you’re not forced into one single way of doing every feature.

When you’re on the river, you can end up kayaking below waterfalls, which turns a normal photo-stop view into something louder and more physical. If you like the idea of thrill without turning it into pure extreme sports, this is a good balance.

I also appreciate the “nature breaks” built into the paddling. One family-focused experience mentioned spotting turtles and dragonflies along the way, which makes the ride feel alive beyond just the drops.

Kayak setup and paddling: tandem comfort for new paddlers

Most people come to kayaking with a mix of nerves and excitement, and this route helps because it isn’t a solo test of skill on day one. You’ll use provided equipment and receive instructions before you launch.

If you go as a pair, tandem kayaks are part of the setup, and that comfort matters when you’re coordinating with someone else while still paying attention to the river. One review specifically called the tandem kayaks comfortable, which is a nice reminder that this is meant to be enjoyable, not just survival.

In the moment, the guide’s job is to read the river for your group. You should expect someone like Dennis to stay focused on everyone’s position, especially near drops. The better part is that you’re not treated like you’re fragile—when you can do something on your own, you’ll likely get room to try.

The human factor: safety, patience, and guides who actually watch you

A big reason this kayaking trip scores so high is guide behavior. Dennis and Alex are mentioned directly in multiple experiences, and the repeated theme is attention plus patience.

For example, guides are described as helping through drops and waterfalls when needed, but also letting people do it themselves when they’re ready. That’s what you want: support without taking over everything.

If you’re traveling with kids or a first-timer, this matters even more. One experience noted especially patient help and thoughtful care around the more physical moments, including support during rock jumping and waterfall sections. Another first-time paddler experience said instructions were clear and questions were answered, and the guide guided the group through the river calmly.

That “stays with you” feeling is also why this tour works for families: the goal is fun, but safety is treated like the main job.

Getting dry after the adventure: finish, change clothes, and move on

After you finish, you drive back to the base quickly. The nice part here is that you can change into dry clothes without turning the rest of your day into a soggy mess.

Practical comfort doesn’t sound glamorous, but it’s one of the reasons activities like this feel worth it. You’ve still got sightseeing to do around Slunj and Plitvice Lakes after your river time, and you don’t want to spend the rest of the day uncomfortable.

If you want a soft landing, it’s also helpful that there’s mention of a changing room and a place to rest during the experience. Some people also noted the option to buy drinks, which is a simple convenience when you’re done paddling.

Timing for 3 hours: what to plan around

The total experience runs about 3 hours (approx.). That includes the time at the base, safety instructions, and the transfer to and from the river section.

Because the trip includes driving and a structured route through multiple waterfalls, it’s not the same as a quick standalone kayak rental. I recommend building it into an earlier part of your day if you want time buffer afterward, especially if you’re combining it with visits around the Plitvice Lakes area.

If you’re coming from farther away, it can still make sense, but treat it like a real excursion. One couple mentioned driving from Split for this outing and felt it was time well spent. That tells you the kayaking itself is meant to be the main event, not an add-on.

Price and value: is $65.33 fair for what you get?

At $65.33 per person, this sits in a mid-range price bracket for guided active trips. What makes the value feel strong is the package: equipment, licensed guides, all fees and taxes, and local transfers are included.

You’re also getting a route with 15 waterfalls, plus the chance to do water-play moments like swimming or jumping (where the guide allows) instead of only doing paddling. In other words, you’re paying for a guided, curated stretch of river time rather than just a kayak and a map.

What’s not included matters too. Lunch and bottled water aren’t included, and photos of the tour aren’t included either. If you know you’ll want a drink afterward, plan on buying it onsite or bringing what you can within what the operator allows.

Who should book this (and who should think twice)

This kayaking option is a strong match if you want action in a scenic place without needing advanced kayaking skills. The experience notes that beginners can participate, and children from 6 years old are welcome.

It’s also a good choice for couples and families because you get tandem kayaking options and a guide who can support different comfort levels across the group. If you like nature spotting and photos but also want movement, you’ll likely enjoy the way the route mixes pacing and viewpoints.

Think twice if your priority is a quiet, low-activity paddle. The beginning and end are action-heavy, and there’s physical excitement throughout. One review also suggested choosing a company with smaller groups, so if you’re very group-sensitive, you may want to ask how groups are handled for your date.

Quick practical tips before you go

You’ll be in neoprene if it’s needed, and you’ll likely get splashed. Here’s how to make your day smoother while staying within what you actually know you’ll do:

• Bring a change of clothes mindset, since you’ll want to get dry after you finish
• Wear swim-suitable clothing under your gear (if neoprene is provided, you’ll be ready for wet time)
• Expect that some moments are optional or alternate (ride vs. walk/jump sections), so listen to the guide and match your comfort level

Also, since the ride depends on conditions, you should plan flexibility. The experience requires good weather, so on a bad day your date may change or you may get a full refund if canceled due to poor weather.

Should you book this Upper Mreznica kayaking trip?

I think you should book it if you want a guided, high-value way to experience Croatia’s Upper Mreznica canyon and its 15 travertine waterfalls in a single half-day block. The combination of warm pools, natural-water features, and clear instruction makes it a rare active tour that still feels welcoming to first-timers.

I’d only hesitate if you strongly dislike larger groups or if you want maximum time on the water with zero “transfer minutes.” The transfer plus group size can affect how long the overall day feels, so aim for dates where you expect smaller groups—or ask the operator directly about group size for your run.

FAQ

FAQ

Where is the kayaking tour meeting point?

The tour starts at Kupa Sports – Rafting & Kayaking base Mreznica at Tržič Tounjski 91, 47264, Tounj, Croatia, and it ends back at the same meeting point.

How long is the kayaking experience on the Upper Mreznica River?

It lasts about 3 hours (approx.).

Is this kayaking trip suitable for beginners?

Yes. The experience states that beginners can participate.

What age can children join?

Children from 6 years old are welcome.

What’s included in the price?

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

What language is the tour offered in, and do I get a ticket on my phone?

The tour is offered in English, and you’ll receive a mobile ticket.

What should I know about weather and cancellation?

The experience requires good weather. If it’s canceled due to poor weather, you’ll be offered a different date or a full refund. Free cancellation is available up to 24 hours in advance for a full refund.

Is lunch or bottled water included?

No. Lunch and bottled water are not included.