The Helena branch is the main branch for the Lewis & Clark Library. It is located in Helena's south side on Last Chance Gulch. The building was built in 1976 with remodels in 2006 and in 2022. The main branch contains a large collection of books, audios, videos, offers free wireless Internet, several community and study rooms, and publicly-accessible computers. There are many available programs and events for everyone of all ages.