They went rock climbing. - Onlar kayalıklara tırmanmaya gitti.
The sport of scaling rock faces, either with or without ropes and other equipment
the sport or pastime of scaling rock masses on mountain sides (especially with the help of ropes and special equipment)
Rock climbing is the activity of climbing cliffs or large rocks, as a hobby or sport. The sport or activity of climbing sheer rock faces, especially by means of specialized techniques and equipment. the sport of climbing up very steep rock surfaces such as the sides of mountains climber