The level of surface is changeable in damp season the lakes merge.
Račkové tarns are situated in high of 1 697 m.u.s.

Lower Račkovo tarn is large 1,19ha and is deep maximum 1,5 m.In dry season surface drops and this divide lakes in two.
Higher Račkovo tarn is smaller than Lower, but deeper. The maximum depth is 10 m.