Destination information

Piilolammi is in Hyvinkää and can be easily reached from several directions. The route from the parking area to the lake is easy. There is a shelter on the way that provides firewood for the unobstructed campfire site, which is accessible for strollers and wheelchairs.

Piilolammi is a narrow forest lake. It is eutrophic but has clean, deep water. There is a swimming dock next to campfire site.

Hyvinkää city maintains a 2.3 kilometre nature trail that goes around Piilolammi. The trail begins in the parking area. There are several information boards along the trail, with information about the local history and nature. The nature trail is categorised as intermediate in difficulty due to the hilly sections and rough terrain.

For more information about the Piilolammi nature trail is available here.

There is a private property on the lake’s eastern shore, and visitors are kindly asked to go around it through forest.

Piilolammi is part of the greater outdoor area of Kytäjä-Usmi and visitors can enter Kytäjä-Usmi outdoor trails and services from the Piilolammi outdoor area. The Kytäjä-Usmi area is maintained by Hyvinkää city and there are trails, skiing routes, and campfire sites. Two of the Hyvinkää city trails go near by Piilolammi —the Kahden piilon kierros (“Two Hide Trail”) and the Kolmen lammen kierros (“Three Ponds Trail”).

For more information about the Kytäjä-Usmi area is available here.

The parking area and road are maintained during winter time.


There is a unobstructed campfire site on Piilolammi beach. It is approx. 500 metres from the parking area. The way down to the beach starts off as a gravel road and then becomes a gravel path. There is a small wooden bridge on the route, and this is accessible for wheelchairs or strollers. On the way, there is also an unobstructed toilet.

Additional information

The Kytäjä-Usmi area, of which Piilolammi is part, is an exceptionally large forested area in southern Finland. The area is typified by small lakes, steep cliffs, and narrow passes. The area is situated in an ancient volcano crater and the gabbro is characteristic of this kind of terrain. This ‘black granite’ is used in gravestones and buildings and one of the many quarries on the area can be found on the eastern shore of Piilolammi. Part of the Kytäjä-Usmi area is under nature conservation.