Klyazma

{{refimprove|date=April 2020}}

{{Infobox river

| name = Klyazma

| native_name ={{native name|ru|Клязьма}}

| image = Vyazniki asv2019-05 img13 Klyazma River.jpg

| image_caption = Klyazma River at Vyazniki

| map = Klyazmarivermap.png

| map_caption = Map of the Volga watershed with the Klyazma highlighted

| mapframe = yes

| mapframe-zoom = 5

| subdivision_type1 = Country

| subdivision_name1 = Russia

| length = {{convert|686|km|abbr=on}}

| source1_location =

| source1_elevation =

| source1_coordinates =

| mouth = Oka

| mouth_elevation =

| mouth_coordinates = {{Coord|display=it|56|10|05|N|42|58|09|E}}

| discharge1_avg =

| progression = {{ROka}}

| basin_size = {{convert|42500|km2|sqmi|abbr=on}}

| tributaries_left =

| tributaries_right =

}}

The Klyazma ({{Lang-rus|Клязьма|p=ˈklʲæzʲmə}}, Klyaz'ma or Kliazma), a river in the Moscow, Nizhny Novgorod, Ivanovo and Vladimir Oblasts in Russia, forms a left tributary of the Oka.[http://bse.sci-lib.com/article062113.html Клязьма], Great Soviet Encyclopedia

The {{convert|686|km}} long river's drainage basin is {{convert|42500|km2}}. The Klyazma usually freezes up in November and stays under the ice until mid-April, although in faster-moving stretches ice-free water occurs until the air temperature drops below {{convert|-10|°C}}.

The largest tributaries of the Klyazma include (from source to mouth):[http://textual.ru/gvr/index.php?card=179347 «Река ОЗЕРО МАЛЫЕ ПОДБОРЦЫ»], Russian State Water Registry

{{div col|colwidth=15em}}

• Ucha (left)
• Vorya (left)
• Sherna (left)
• Kirzhach (left)
• Peksha (left)
• Polya (right)
• Koloksha (left)
• Nerl (left)
• Sudogda (right)
• Nerekhta (right)
• Uvod (left)
• Teza (left)
• Lukh (left)
• Suvoroshch (right)

{{div col end}}

The Klyazma is navigable within {{convert|120|km}} from its estuary and in the area of the Klyazminskoye Reservoir. The cities of Gorokhovets, Mendeleyevo, Pavlovsky Posad, Vladimir, Kovrov, Shchyolkovo, Losino-Petrovsky, Noginsk, Orekhovo-Zuyevo, Sobinka and Vyazniki stand on the shores of the Klyazma River.

The basin of the Klyazma formed the center of the Vladimir-Suzdal principality in the 12th to 14th centuries CE.