4.9
(16)
136
riders
28
rides
Mountain biking around Rezerwat Lake Kośno offers a network of trails through a natural park characterized by forests, lakes, and varied terrain. The region, located around powiat olsztyński, features a mix of flat sections and gentle inclines, suitable for different skill levels. Riders can expect routes that navigate around water bodies and through wooded areas, providing a natural setting for mountain biking. The landscape primarily consists of woodlands and lake shores, with some routes incorporating historical markers.
Last updated: May 13, 2026
3
riders
29.7km
02:10
200m
200m
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.

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5.0
(1)
4
riders
77.0km
05:58
550m
550m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
5
riders
44.8km
03:18
300m
300m
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.
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A very nice lake for camping and a bonfire. At the bottom, there's an observation tower. A perfect spot for birdwatching.
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Probably the most prominent structure of the Brick Gothic style in northern Poland, rhe church was probably built between 1370 and 1380, after Allenstein was granted city rights in 1352. The impressive east gable was built shortly after 1429. During the Fourth Coalition War, the church was used as a prison for 1,500 Prussian and Russian soldiers in the winter of 1806/07, who used the furnishings as firewood. The current furnishings were then created, which fortunately survived the end of the war in 1945 thanks to the work of Pastor Johannes Hanowski. The baroque interior design that had been installed in the meantime was removed in 1866. In 1896, the main altar with its valuable Flemish paintings, which had been installed from the castle's St. Anne's Chapel, fell victim to a fire. In 1899, the roof was replaced. Around 1900, the composer Feliks Nowowiejski worked as an organist at St. James' Church. On June 28, 1972, the church became a co-cathedral of the archdiocese. In 1991, Pope John Paul II visited it, and in 2004, he elevated St. James' Church to a minor basilica. The three-aisled hall church was built without a choir. The tower was initially built free-standing only up to the church roof and was only raised to its current size between 1582 and 1596. With the construction of the side chapels, which were added between 1715 and 1721 together with a general restoration, the tower became part of the church. The current spire was added in 1867/68, with the golden star dating from the original building in 1596. At the same time, the façade was redesigned in a neo-Gothic style, with Ferdinand von Quast and August Stüler contributing. In 2001, the church received a representative main portal made of bronze.
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In 1334, a watchtower was established on the Łyna River. In 1346, the forest was cleared at the location for a new settlement, mentioned in a historical document from 1348. The following year, the Teutonic Knights began the construction of an Ordensburg (castle) as a stronghold against the Baltic Prussians. Allenstein was granted municipal rights by the cathedral chapter of the Bishopric of Warmia in October 1353. The German "Allenstein" referred to the river's Baltic Prussian name Alna, which meant a hind. Local Poles, having arrived along with German settlers, called it Holstin and Olsztyn, which are Polonizations of the German name. The castle was completed in 1397. The town was captured by the Kingdom of Poland during the Polish-Lithuanian-Teutonic War in 1410, and again in 1414 during the Hunger War, but it was returned to the monastic state of the Teutonic Knights after hostilities ended.
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The market square in Pasym with the Town Hall - a quiet and peaceful place, away from car traffic.
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A chapel on the "Jealousy" nature trail
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A square with benches. You can eat something here.
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Gothic Evangelical-Augsburg church in Pasym. The construction was completed in 1391. Since the Reformation, it has been a Lutheran church. The characteristic shingled cupola-shaped tower was built during the reconstruction of the church after a fire at the end of the 18th century. The main altar is in the late Mannerist style, the Baroque pulpit from 1680, Gothic benches from the 15th century and Mannerist benches from the 17th century, organ from the 18th century.
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Church in Pasym Sacred Heart of Jesus, built in 1884.
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There are over 20 mountain bike trails in the Rezerwat Lake Kośno area. This includes a variety of routes, with more than 5 easy, over 15 moderate, and 1 difficult option to choose from.
Yes, the region offers several easy mountain bike trails perfect for beginners or family outings. One excellent option is the Pasym Town Hall loop from Purda, which is 26.9 km long and takes approximately 1 hour 48 minutes to complete.
Trail lengths vary significantly, from shorter routes around 25-30 km to longer, more challenging rides exceeding 70 km. Durations can range from under 2 hours for easier trails to nearly 6 hours for difficult ones, depending on the route and your pace.
Yes, for experienced riders seeking a challenge, there is at least one difficult route available. The Lake Kielarskie at Zazdrość – Olsztyn City Hall loop from Marcinkowo is a demanding 77.1 km trail that typically takes around 5 hours 59 minutes to complete.
Many of the mountain bike trails around Rezerwat Lake Kośno are designed as loops, allowing you to start and finish at the same point. Examples include the Stone Waymarker loop from Bałdzki Piec and the Sources of Lake Kielarskie – Lake Kielarskie at Zazdrość loop from Marcinkowo.
The best time for mountain biking is generally from spring through autumn when the weather is mild and the trails are dry. The region's forests and lake shores offer pleasant riding conditions during these seasons. Winter riding is possible but may require specific gear due to snow and ice.
The mountain bike trails in Rezerwat Lake Kośno are highly rated by the komoot community, with an average score of 5.0 stars from more than 10 reviews. Riders often praise the natural setting, varied terrain, and the scenic routes around the lakes and through woodlands.
While specific regulations for dogs on trails can vary, the natural park setting with woodlands and lake shores generally offers a dog-friendly environment. It's always recommended to keep dogs on a leash and clean up after them to respect wildlife and other trail users.
Yes, some routes in the area incorporate historical markers. For instance, the Stone Waymarker loop from Bałdzki Piec features a notable stone waymarker, offering a glimpse into the region's past amidst the natural landscape.
The terrain around Rezerwat Lake Kośno is characterized by a mix of woodlands, lake shore paths, and open natural park areas. You can expect both flat sections and gentle inclines, providing a varied and engaging riding experience suitable for different skill levels.
Given the region's landscape of lakes and forests, many trails offer scenic views, particularly along the lake shores. Routes like the Sources of Lake Kielarskie – Lake Kielarskie at Zazdrość loop from Marcinkowo provide extensive riding around aquatic landscapes, offering numerous picturesque spots.
While specific crowd levels can vary, exploring some of the longer or slightly more remote moderate trails, such as the Brick Roadside Shrine – Historic Wooden House loop from Marcinkowo, might offer a more secluded experience compared to the most popular routes.


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