The gulf is more than 300 km wide. Its limits are the NE projection of the
Kolyma Lowlands close to the
Medvyezhi Islands in the west and the
Nutel'gyrgym Peninsula and
Ayon Island in the east. The
Kolyma River flows into the sea in the western side of the Kolyma Gulf, forming a huge
river delta full of islands. The bay's coastline is lowland dotted with numerous lakes and swamps. The sea in this bay is frozen for over nine months every year and is often clogged with ice floes. Other rivers flowing into the Kolyma Gulf are the
Rauchua and the
Chukochya River. Administratively the western section of the Kolyma Gulf belongs to the
Sakha Republic (Yakutia), while its eastern section belongs to the
Chukotka Autonomous Okrug of the
Russian Federation. ==References==