Ogni estate andiamo in montagna a fare lunghe passeggiate.
Every summer we go to the mountains to take long walks.
Pronunciation: OH-nyee EH-sseh-tah an-DYAH-mo een mon-TAHN-ya ah FAH-reh LOON-geh pahs-seh-DJAH-teh
Grammar: "Montagna" is a feminine noun (la montagna, le montagne). After the preposition "in" with places like mountains, you usually don't use the article: "in montagna".