The great circular hiking trail, which is 17 km long, includes all the circular hiking trails around Lake Bostalsee. The dam wall at Lake Bostalsee or the leisure park in Neunkirchen are perfect places to start this hike.

Experienced hikers can also opt for a day-long hike past Lake Bostalsee and over the forest-covered hills around Bosen, Eckelhausen, Gonnesweiler and Neunkirchen. This can also be shortened at many points.