Upper Mreznica River: Kayaking & Waterfalls Day Trip Slunj

Summary

Kayak through travertine waterfalls and quiet pools near Slunj

You’ll kayak along Croatia’s Upper Mreznica River near Slunj, gliding through clear pools and riding down 15 waterfalls with a local guide leading each step. Feel warm sun on your face as you float between falls, try canyoning if you’re brave, and end with that content tiredness only real adventure brings.

What’s the experience like?

I didn’t really know what to expect when we pulled up near Slunj — just that we’d signed up for this Upper Mreznica River kayaking trip, and the guide, Luka, was already waving us over with a grin. The river looked almost too calm at first, sunlight flickering on the green water. But then you hear it — that low rushing sound from somewhere downstream. Luka handed us our gear (I got a neoprene suit because I’m always cold) and explained how we’d be paddling through these travertine waterfalls. He made it sound easy, though I definitely felt my nerves kick in when he pointed out where the highest fall was (8 meters!).

We started off slow, just gliding between these crazy-clear pools. The air smelled like wet stone and grass — kind of earthy but fresh. Every so often you’d spot a dragonfly hovering or see little fish darting under your paddle. Then suddenly there’s this moment where the river drops away and you’re riding down a natural slide — honestly, I laughed out loud even though I got splashed right in the face. Luka would shout encouragement (“Go! Go!”) or tease us for overthinking it. At one point he asked if anyone wanted to jump from the big fall; I chickened out but cheered for a German couple who did it together.

The middle stretch is quieter — just easy paddling, no pressure to race or anything. You get these pockets of warm water between falls where you can just float for a bit and look up at the trees leaning over the canyon. There’s this feeling of being tucked away from everything else; nobody around except our small group and maybe some birds overhead. And then it picks up again near the end — more little drops, more laughter echoing off the rocks. My arms were tired but in that good way, like after swimming all afternoon as a kid.

After we finished, Luka drove us back to change into dry clothes (my hair was still dripping). I keep thinking about that stretch where everything went quiet except for our paddles dipping in the water — not something you really plan for but somehow it sticks with you.

Step-by-step itinerary

Day 1 — Kayaking on Upper Mreznica River

• Receive safety gear and instructions
• Drive to kayaking start point
• Kayak down 15 waterfalls
• Ride natural waterslides and jump into pools
• Enjoy peaceful paddling between falls
• Drive back to base
• Change into dry clothes

Top questions

Is kayaking on Upper Mreznica River suitable for beginners?

Yes, beginners can join this tour as most sections are calm and guides assist at every waterfall.

How high is the biggest waterfall on this kayaking trip?

The highest waterfall is 8 meters tall; you can jump or walk around it if preferred.

Are children allowed on the Upper Mreznica River kayaking tour?

Children from 6 years old are welcome to participate with adults.

How far is Slunj from Zagreb or Plitvice Lakes?

The starting point is about 1.5 hours from Zagreb and 30 minutes from Plitvice Lakes by car.

What equipment is provided for this kayaking experience?

You receive all necessary safety gear, neoprene suits if needed, kayaks, and paddles.

Do I need to be physically fit to join?

This day trip suits most fitness levels but isn’t recommended for those with spinal injuries or poor cardiovascular health.

Is lunch included in this kayaking day trip?

No lunch is included; only equipment, fees, guides, and local transfers are provided.

How long does the actual kayaking part last?

The activity covers about 3 kilometers of river with action at both ends and peaceful paddling in between.

What’s included

Your day includes use of all necessary equipment like kayaks and safety gear (plus neoprene suits if needed), licensed guides who lead every step down the waterfalls, all fees and taxes covered upfront, plus local transfers between base and river start so you don’t have to worry about logistics.