Part of Ostrov - 2 - východní část, GK masiv has 5 routes documented on climbing.place. Routes range from grade 1 to 4+. Routes are listed below with grade, style, and community notes.

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1
Western jagged chimney
Rock Climbing Textile belay
4
Right at the edge of the south face to a grassy ledge,…
Rock Climbing Fixed belay Textile belay
3
East feature edge, as above.
Rock Climbing Textile belay
4+
In the edge of the south face, over a chimney (Bh), as…
Rock Climbing Fixed belay Textile belay
2
Start in the eastern chimney on steps, as above.
Rock Climbing Textile belay