Caucasus
The Caucasus Mountain range forms a natural border between Russia and Southwest Asia. It stretches between the Black Sea and the Caspian Sea, separating Eastern Europe from Western Asia. This range includes notable peaks like Mount Elbrus, which is the highest in Europe. The Caucasus is also significant for its diverse cultures and complex geopolitical landscape.
No mountain range separates Europe from Russia. Part of Russia is in Europe. What you are thinking about is what separates Europe from Asia. That is mainly the mountain range known as the Urals, and also the mountain range known as the Caucasus mountains. Most of Russia is in Asia.
the southwest side of Mongolia but i don't know what it is called
The Zagros Mts.
The Altai Mountain Range is in northwestern Mongolia. The mountain range extends into the neighboring countries of China, Russia, and Kazakhstan.
The Himalayas border the southwest region of China. This mountain range is home to some of the world's highest peaks, including Mount Everest.
The Allegheny Mountain range makes up most of southwest Pennsylvania.
The main mountain range in Russia is called the Ural Mountains
Ural mountains
southwest
southwest
the Ural mountains.