However, the events related to the Thirty Years' War and religious fights of that period played the greatest role in the Karkonosze Mountains.. It is a paradox, that this war, which devastated Silesia so terribly, It brought a wave of settlement to the Karkonosze Mountains. Admittedly, there were fights here as well, but the local population was harassed above all by robberies and contributions from the armies of all the warring sides. Here, still in 1579 r., a peasant uprising broke out in the count von Schaffgotsch estate in Kowary, but it had an economic basis.

The Thirty Years' War reached the foothills of the Karkonosze relatively early, forcing the population to leave their homes, leave most of your belongings and look for safe hiding places deep in the mountains, in hope, that the enemy will not get there. By coincidence, it contributed to a better knowledge of the Karkonosze Mountains. You know, that they escaped through the valleys of Łomniczka, Reds, Podgórna, Sośniak and many others. Some of the local names come from this period, clearly related to the events of the war. They include the Cossack Valley. W 1622 r. Lishovans under the command of Stanisław Stroynowski appeared in Kowary and Jelenia Góra, accompanied by Prince Zygmunt Karol Radziwiłł as hetman. They supported Emperor Ferdinand II in the war and came to this area after the expedition to the Kłodzko region. They were preceded by exaggerated opinions about the atrocities committed, dandruff, but also bravery. No wonder then, that in the local population, calling them Cossacks, they aroused panic fear.

The villagers, running away to the mountains, they often stayed in them for long periods and necessarily built some buildings. This is how Budniki was established, which later turned into a village, On the other hand, Dolne Miasteczko and Górne Miasteczko established in the vicinity disappeared. Only the names of the slopes remained after them. Such hiding places also included Husyckie Kąty nad Miłków. Virtually every village had its shelter in the mountains. Life then went on in them, and the villages were empty, looted, if not burned. These forest settlements after the war often remained as seasonal shepherd settlements, at the same time serving hikers who venture into the mountains more and more often.

Despite the horrors of war, the situation on the Silesian side was probably better, since throughout the entire period of the Thirty Years' War, successive groups of religious refugees from the Czech Republic were coming here, seeking a more peaceful life among Protestant fellow believers. And so in 1620 r. Two groups came to Marysin, perhaps downloaded there by Maria Pluch. Karpacz was developing rapidly, w 1602 r. there was already a judge with an inn, w 1622 r. a large group of refugees from the Czech Republic settled there, who founded the then famous herbal medicine center, w 1635 r. twenty families from the Czech Republic founded Karpacz Górny above, finally in 1643 r. more groups showed up. W 1644 r. Swiss carpenter Martin Markensteiner, fleeing from the Czech Republic, will establish! Borowice, three Michałów brothers – also from the Czech Republic -Michałowice, and Matheus Lange from Przesieka – Zachełmie. Only the last place was established after the war, around the middle of the 17th century, as a normal colony in the estate of Count von Schaffgotsch, but also there, in years 1650-1651 a group of Czech exulators settled under the leadership of Fuckner. The beginning of Wilcza Poreba was a bit different, established in the 17th century. as a chicken settlement, in which the forester's lodge is located. The genesis of the Biała Dolina in Szklarska Poręba was also different. He founded it in 1617 r. Count Hans Ulrych von Schaffgotsch at the new glassworks, run by an ancestor of a well-known family of Silesian glaziers – Wolfgang Preussler. W 1651 r. Jagniątków grew up with Behndel's judging, where refugees from the Czech Republic also lived.