 There are several islands in the river, the largest of which are Tatyshev and Otdyha Isles, used mainly for recreation.To the south and west, Krasnoyarsk is surrounded by forested mountains averaging in height above river level.The most prominent of them are Nikolayevskaya Sopka (notable for its ski jumping tracks), Karaulnaya Gora, and Chornaya Sopka, the latter being an extinct volcano.