More direct
The gravel track
The more direct, easier route toward the springs.
VRELA SANE NATURAL MONUMENT · WESTERN BOSNIA
Vrela Sane —where the Sana is born
High in the hills above Pecka, the Sana River doesn't trickle into being — it arrives all at once. Three powerful karst springs rise straight out of the limestone, already a river.
This guide does one thing: it tells you exactly what to expect before you set out — how to get there, how long it takes, where to park, what to bring, when it's most beautiful, and how to behave in a protected area.
- 3 karst springs
- 320.69 ha protected
- ≈6 km from the center
- half a day
Quick facts
The protected area in numbers
- Status
- Natural Monument (Government of Republika Srpska, 30 Sept 2021) — the first protected area in the Mrkonjić Grad municipality
- Area
- 320.69 ha · protection regimes of level II (267.48 ha) and level III (53.21 ha)
- Municipalities
- Mrkonjić Grad and Ribnik; mostly within the village of Donja Pecka
- What it protects
- Three karst springs of the Sana · the lower Korana River · the Mračaj estavelle and cave
- Values
- Hydrological, hydrogeological, geomorphological and landscape
- From the center
- ≈6 km; the final ~1 km is on foot only
- Duration
- Half a day — exact walking time will be published once the route is mapped
The three springs
The three springs of the Sana
The Sana is born not from one source but from three strong karst springs, at their most powerful in spring when meltwater fills the limestone massif. The water runs clear and cold year-round, and the surroundings — a cave, a waterfall and a "dry spring" that only comes alive at high water — give the place a feeling of untouched wilderness.
The springs sit in genuine wilderness and can only be reached on foot; for the last kilometre there is nothing but a footpath. That is exactly what keeps them pristine — no parking by the water, no crowds, just a river beginning in front of you.
three springs · one river
The Mračaj estavelle
A spring that is sometimes a sinkhole
Near the springs lies Mračaj, one of the region's most intriguing hydrological features. An estavelle is a point that acts as a spring or as a swallow-hole depending on the groundwater level. Its underwater passages draw cave divers from around the world.
On the classic route to the springs, Mračaj usually comes first — then the trail continues to the three springs of the Sana.
~450 m
cave length
~26 m
depth
For visitors, Mračaj is a viewpoint and interpretation stop — not a place to enter or dive without expert guidance.
The Korana canyon
The hidden trail along the Korana
The lower Korana, a tributary of the Sana, runs through the same protected area and is one of its most beautiful parts. A marked trail about 3 km long follows the canyon — suitable for hiking, and for canyoning in the right water conditions.
Long hidden, the path was recently opened up through the "Green destination in the upper Pliva and Sana" project (EU4Business): it winds along a mossy, rocky course, making the canyon accessible to casual walkers, not just experienced explorers.
- waterfalls
- old watermills
- old bridges
Canyoning through the Korana is a guided, technical activity — not an independent walk. Conditions depend on water and weather; confirm availability with the center.
Getting there
From the center to the springs — 6 km, step by step
The springs are about 6 km from Visitor Center Pecka, along two routes that share the same start.
0 km
Visitor Center Pecka
Start in front of the old school — advice, a map and one last coffee before the trail.
0–3 km
Through the village, on asphalt
The road leads through the village, past pastures, orchards and old stone houses. Drive it or walk it — if you have the time, walking through Pecka has its own charm, with warm-hearted households and small drinking-water springs along the way.
End of the asphalt — a choice
Where the road turns to gravel, signs mark two options:
More beautiful
Through the Korana canyon
The longer route along the river — waterfalls, watermills and bridges the whole way.
final 1 km
On foot only
Whichever route you take, the springs themselves are reached only on a footpath. Here every road ends and the wilderness begins.
≈6 km
Vrela Sane
Three springs burst out of the limestone — the river begins in front of you.
Practical
Parking, difficulty and gear
Parking
Lower vehicles should park at the widening beside the road, where the gravel begins — beyond that, the terrain isn't for every car. Exact location and advice for larger vehicles will be confirmed by the center.
Difficulty and duration
No mountaineering experience needed, but bring sturdy shoes and basic fitness — the terrain is gravel and rocky footpath. Exact walking time and elevation gain will be published once the route is GPX-mapped. For children and dogs, ask the center for advice.
What to bring
- sturdy footwear — the trail is rocky and wet
- plenty of water, even with springs along the way
- sun protection for the shadeless section
- layered clothing
- a camera
When to visit
The best time to come
The most striking season
Spring
The springs at their most powerful, nature at its most lush.
Autumn
Colour and mild temperatures — a great choice for hiking.
Summer
Fine, but the trail has little shade — avoid the hottest days and carry plenty of water.
Winter
Conditions and access depend on the weather — check with the center.
Protected area
Behave like the river's guest
Vrela Sane is a protected Natural Monument with level II and III protection regimes, so we treat it with respect:
Emergency number112
Stay on marked trails.
Carry out all waste — everything you bring in goes back with you.
No fires; don't damage plants, watermills, dry-stone walls or bridges.
Don't disturb wildlife or livestock on the pastures.
You walk at your own responsibility — carry a charged phone.
Nearby
More to see in the area
Where to stay
Sleep at the trailhead
The closest base for Vrela Sane is Visitor Center Pecka — sleep in the heart of the village and be first on the trail in the morning.
Check availability
FAQ
Frequently asked questions
How far is Vrela Sane from Visitor Center Pecka?
About 6 km. The first 3 km through the village can be driven or walked; the final kilometre to the springs is on foot only.
Can you reach the springs by car?
Not all the way. You can drive the asphalt section through the village; then comes gravel, and the last stretch is footpath only.
How long is the walk?
Half a day for the whole trip; exact walking time will be published once the route is mapped.
Is it suitable for children?
The village section is easy; the final stretch depends on age and fitness. The center will gladly advise.
When is the best time to come?
Spring (the strongest springs) and autumn (colour, mild temperatures). In summer, carry plenty of water — the trail has little shade.
What is the Mračaj estavelle?
A hydrological phenomenon near the springs: a point that is sometimes a spring, sometimes a sinkhole, depending on groundwater. The cave is ~450 m long and ~26 m deep.