Nature Reserve Guide
Rezerwat Lake Kośno is a nature reserve in Poland, characterized by its deep, pristine lake and extensive surrounding forests. This area features a diverse landscape of post-glacial origin, with varied terrain that includes steep lake shores, flatter northern sections, and dense forest complexes primarily composed of pine, alder, birch, and spruce. The natural environment of Rezerwat Lake Kośno provides a setting for several sports like touring cycling, mountain biking, road cycling, hiking, and more.
74
Routes
4.6
(79)
Average rating
583
People visited

4.7
(15)
73
riders
39.0km
02:32
170m
170m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

13
riders
69.5km
04:43
270m
270m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(1)
7
riders
41.8km
03:02
190m
190m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.3
(3)
6
riders
19.8km
01:41
140m
140m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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5.0
(2)
46
riders
30.3km
02:24
270m
270m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

6
riders
54.9km
03:23
350m
350m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

5.0
(1)
4
riders
26.9km
01:48
170m
170m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

5.0
(1)
4
riders
77.0km
05:58
550m
550m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
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29
riders
41.0km
01:53
200m
200m
Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.

11
riders
48.4km
02:00
210m
210m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

11
riders
60.2km
02:27
220m
220m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

5.0
(1)
13
riders
50.3km
02:11
300m
300m
Moderate road ride. Good fitness required. Some segments of this route may be unpaved and difficult to ride.
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4.8
(5)
20
hikers
5.11km
01:23
70m
70m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

5.0
(3)
9
hikers
9.42km
02:28
70m
70m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

5.0
(4)
10
hikers
20.9km
05:23
110m
110m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.

5
hikers
10.5km
02:44
70m
70m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
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17
runners
7.46km
00:46
30m
30m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(6)
9
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

10
runners
6.79km
00:42
30m
30m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

6
runners
15.3km
01:43
90m
90m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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6
riders
53.1km
03:26
350m
350m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.0
(1)
6
riders
62.0km
03:46
270m
270m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

3
riders
52.9km
03:18
280m
280m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(1)
5
riders
34.7km
02:37
290m
290m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Rezerwat Lake Kośno offers a variety of outdoor activities including touring cycling, mountain biking, road cycling, hiking, jogging, and gravel biking. The reserve features more than 70 routes across these sports, with an average rating of 4.8 stars from over 600 visitors.
A popular touring cycling route is the Tylkowo Municipal Beach – Lake Kalwa loop from Krzywonoga, which is about 21.5 miles (34.6 km) long. Another option is the Lake Kalwa – Lake Domowe Duże loop from Pasym, covering approximately 42.9 miles (69.2 km).
Yes, easy cycling routes are available. The Roadside Cross – Lake Łajs loop from Tylkówko is an easy touring cycling route of about 12.3 miles (19.8 km). For mountain biking, the Pasym Town Hall loop from Purda is an easy option, approximately 16.7 miles (26.9 km) long.
The Pasym Town Hall loop from gmina Pasym is a highly-rated moderate mountain biking trail, approximately 18.8 miles (30.3 km) in length. Another option is the Sources of Lake Kielarskie – Lake Kielarskie at Zazdrość loop from Nowa Kaletka, a moderate route of about 39.7 miles (64.0 km).
The Czerwonka Duża Lake – View of the lake loop from Kopanki is an easy hiking trail, approximately 3.2 miles (5.1 km) long. For a more challenging experience, the Lake Kalwa – View of Lake and Pasym loop from gmina Pasym is a difficult hike covering about 12.8 miles (20.6 km).
Rezerwat Lake Kośno is a landscape reserve established to protect unique post-glacial features. It encompasses Lake Kośno, one of the deepest lakes in the Warmia region, and extensive surrounding pine forests with alder, birch, and spruce. The reserve also protects charophyte meadows in the lake and protected species like yellow and white water lilies.
The reserve is a significant sanctuary for waterfowl and predatory birds. Birdwatchers may observe ospreys, marsh harriers, hobbies, goshawks, common buzzards, various duck species, grebes, swans, and cormorants. White-tailed eagles are also occasionally seen in the area.
Yes, komoot offers several guides for the area, including Cycling around Rezerwat Lake Kośno, Hiking around Rezerwat Lake Kośno, and MTB Trails around Rezerwat Lake Kośno. Guides for road cycling, running, easy hikes, and gravel biking are also available.
Rezerwat Lake Kośno is a popular destination, with over 600 visitors having shared their experiences on komoot. The routes in the area have received an average rating of 4.8 out of 5 stars, indicating high satisfaction among users.
Yes, many routes in the area are circular. Examples include the Tylkowo Municipal Beach – Lake Kalwa loop from Krzywonoga for touring cycling and the Pasym Town Hall loop from gmina Pasym for mountain biking.
An approximately 12.4-mile (20-kilometer) nature and education path encircles Lake Kośno. This path is suitable for both walking and cycling, though some sections can be challenging for bikes due to the dense forest terrain. It features viewpoints for observing wildlife.
The reserve is managed by the Olsztyn Forest District. Information can be found on their website, jedwabno.olsztyn.lasy.gov.pl. An email contact for the Olsztyn Forest District is marek.tredowski@olsztyn.lasy.gov.pl.

