GRZBIET STRAŻNIC
Three watchtowers on the rocks. The longest loop. The medieval edge of the kingdom.
- Distance
- 48.4 km
- Elevation
- ↑ 410 m
- Duration
- 3h 10min
Along the limestone ridge that links three forgotten strongholds — Suliszowice, Przewodziszowice, Ostrężnik. The longest day out of all our trails.
Trail details
- Shape
- loop
- Direction
- counter-clockwise
- Start
- WILK base · Olsztyn Jurajski · 50.7484 N · 19.2650 E
- Elevation
- ↑ 410 m · ↓ 410 m
- Altitude
- 280–410 m a.s.l.
- Time with stops
- 6–7 h
Who it's for
For seasoned riders
48 kilometres, 410 m of climbing — the longest WILK loop. Roughly 40% tarmac and cycle path (there's even a long stretch of dedicated cycle path towards Ostrężnik), the rest gravel, packed gravel and forest roads. This is not a technical trail: the gradients are gentle, the surface is mostly smooth, no white-knuckle descents. The difficulty comes purely from the distance — this is a full-day expedition, not a morning spin. Save it for last — once you have Trop Wilka and Dolina Szeptów behind you and you know how to manage the battery. The battery is the key. 48 km on pedal assist is comfortably within range of our e-bikes, but ride economically — stay in **Eco** and **Tour** on the flat, save **Sport** and **Turbo** for the climbs to the watchtowers. On loose forest ground where you need to push the bike, use **Walk Assist** (press and hold the lower assist button — the motor pushes the bike along for you).
For history hunters
Three medieval watchtowers on a single loop — links in the defensive line along the western border of the Kingdom of Poland, from the days of Casimir the Great and Władysław Opolczyk. Each on its own rock, each calling for a short walk up on foot. With the sightseeing included — a full day.
In Tour mode, no stops — 3h 10min. With the three watchtowers and Złoty Potok — plan 6–7 hours. Set off early.
Along the way
- km 0
Ruins of Olsztyn castle
Start from the WILK base, the ruins on your right. This time straight south — into the forests of the Złoty Potok forest district. The first 200 m are cobblestone, beneath the walls.
- km 2–10
Forests of the Złoty Potok district
The trail works its way south on a mix of forest roads, gravel and tarmac links between villages. Wide, well-packed surfaces, gentle climbs. Quiet, with clumps of beech.
- km 12.5
Suliszowice watchtower
The first of three. The ruins of a stone watchtower on a lone 15-metre limestone rock (about 400 m a.s.l.), raised between 1370 and 1391 — under Casimir the Great or Władysław Opolczyk. A 19.5-metre stretch of wall in broken limestone survives, with the remains of buildings at the foot of the rock. It stands about 600 m east of the trail — leave the bike and walk up.
- km 19
Przewodziszowice watchtower
The second watchtower and the southernmost point of the trail, already on the edge of Żarki. The ruins of a 14th/15th-century stronghold on a rock. From 1426 to 1454 it was the lair of the robber-knight Mikołaj Kornicz „Siestrzeniec", who plundered wealthy merchants, shared the spoils with the local peasants and hid his treasure in the cracks of the rocks. Together with Suliszowice it guarded Ostrężnik castle.
- km 20
The ridge (410 m)
The highest point of the trail and the one it is named after. The limestone ridge that strings the watchtowers into a single line of defence. A brief panorama, then a long descent east.
- km 24
Turning point
The easternmost point. The trail turns back north, towards Ostrężnik and Złoty Potok.
- km 29
Ostrężnik castle
The third and most mysterious stronghold — the heart of the old defensive system. Little-understood ruins of a 14th-century castle on top of a rock (380 m a.s.l.), in the shade of a beech wood. At the foot of the rock lies Ostrężnik Cave — about 90 m of horizontal passages. The whole site sits within the Ostrężnik nature reserve, at the heart of the Eagles' Nests Landscape Park. The „Tropem tajemnic" nature path (1.5 km) loops around the site. Leave the bike by the road and do the rest on foot.
- km 32
Złoty Potok
The trail brushes Złoty Potok from the south. The full visit — palace, trout farm, ponds — is covered on Dolina Szeptów; here it is a stop for water and a breather before the way back.
- km 36–46
The way back west
Through the forests back to Olsztyn. Gentle climbs, long forest straights. The landscape settles down after three strongholds.
- km 47.9
Back
The ruins of Olsztyn castle in the afternoon light. The longest day comes to an end. The last 200 m of cobblestone beneath the walls.
Surface
Road types
Profile
A counter-clockwise loop, 410 m of climbing spread over 48 km. Highest point: 410 m (the ridge between the watchtowers, km 20). Lowest: 280 m (the forests south of Olsztyn). The surface is split roughly in half: ~40% tarmac and cycle path, the rest gravel, packed gravel and forest roads. Gradients are gentle — the difficulty comes from the distance, not the technique. You climb to all three watchtowers on foot, not on the bike.
What you'd miss from the saddle
On the trail (short walks on foot)
Suliszowice watchtower (km 12.5), Przewodziszowice watchtower (km 19), Ostrężnik castle with Ostrężnik Cave (km 29).
Right next door
Złoty Potok (km 32) — the Raczyński palace, trout farm, ponds; full write-up on the Dolina Szeptów trail. Żarki (km 19) — a small town with a market and shops, the last place to stock up before the ride home.
Off the trail, but nearby
For a separate trip: the whole Eagles' Nests Trail — Ostrężnik is one of its links, in line with the castles at Olsztyn, Mirów and Bobolice.
Route file
Checking access…
Trail available in season
2026
30 May – 31 Oct · 7 days a week
Free cancellation up to 7 days before departure
Source: Open-Meteo · refreshed every 30 min