The 7.5 km long Tiilijärvi Lakes trail in Hollola loops around three lakes, Vähä-Tiilijärvi, Keski-Tiilijärvi and Iso-Tiilijärvi. The trail consists of flat terrain, forestal paths and wooden duckboards. The northern part of the trail is steeper and great for hikers looking for a more challenging walk. Along the trail there are places with beautiful views over the lakes, the Soisalmensuo marsh and a hazelnut grove with all of their fauna. Enjoy the unique outdoors close to the city.

The three clearwater lakes are spring-fed and getting their waters from the groundwaters of the First Salpausselkä ridge, and the lakes form one of the geosites of the Salpausselkä aspiring UNESCO Global Geopark. There are public beaches on the shores of the lakes where you can take a refreshing swim or spend longer periods of time. The largest of the lakes, Lake Iso-Tiilijärvi, is also a popular diving destination.