Part of Modřín, Semler has 4 routes documented on climbing.place. Routes range from grade 4+ to 6-. Routes are listed below with grade, style, and community notes.
Common styles: Rock Climbing, Sport Climbing, Textile belay, Danger.
Nature protection: Tower and surroundings closed from February 23 to June 30 due to peregrine falcon nesting.
OVK: Magnesium is limited according to sandstone rules, first ascents only with the consent of the administrator.