Ugra (Oka)

Template:Short description Template:More citations needed Template:Infobox river The Ugra (Template:Langx) is a river in Smolensk and Kaluga Oblasts in Russia, left tributary of the Oka. The east-flowing Ugra joins the north-flowing Oka at Kaluga and the united river, called the Oka, continues east to the Volga. In the 16th century, the Ugra-Oka confluence was the western end of a line of forts protecting Muscovy from Tatar raids. The river is known for the Great stand on the Ugra River. Its length is Template:Convert and its basin Template:Convert.<ref name=gvr>«Река УГРА», Russian State Water Registry</ref> It is frozen from late November (sometimes as late as January) until the end of March. 60% of its annual flow is snowmelt, mostly in April.

A part of the valley of the Ugra located in Kaluga Oblast belongs to Ugra National Park.<ref name="parkgen">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

External links

• The Ugra River: photos

Template:KalugaOblast-geo-stub Template:SmolenskOblast-geo-stub Template:Russia-river-stub