The river Yzne flows in Taurage county, Silale district, the river Akmena right tributary. Length of the river 26 km, the basin area 92 km ². The source at Siauduva village, 4 km south from Laukuva town. Flows through the lake Dievytis to southeast. Flows into the river Akmena 50 km from its mouth 2 km south from Kaltinenai town. Average gradient 182 cm/km. Average rated discharge upstream the brook Viksve mouth 0.30 m³/s, at the mouth 1.10 m³/s.

At high water level. Spring flood, or after heavy rains.
Rapids, shalows, strainers.
WW 0/1+ (2-).

14.6 Bridge. left Bagdonas. right Bitlaukis. The river channeled.
14.3 The channeled section of the river ends. The river to the mouth flows through forests, width approx. 5 m. Strainers in the riverbed. The banks steep, a few meters height. Current strong, small rapids. Average discharge approx. 1 m³/s. Average gradient to mouth 136 cm/km.
12.3 left the brook Y-5.
11.9 left the brook Y-4.
10.9 right the brook Y-3. right Lauciske.
9.2 left the brook Y-2.
8.2 left the brook Y-1.
7.6 left Vosgirdai.
6.6 left hillfort Gedminiske.
5.8 Kaltinenai - Ruteliai road bridge. Under the bridge the river flows through concrete pipe. left Gedminiske. right Ruteliai.
5.7 left Yznale.
3.4 left hillfort Gedminiske II.
1.2 left Siukseliai.
0.0 The Yzne flows into the river Akmena.