The infancy narratives (the first two chapters of Matthew and Luke) definitely comprise the bulk of Scriptural references to Mary. She is, of course, also present on Calvary when Christ died (John 19:25-27).
Beyond those stories, Mary does turn up in a few other places, all relating to Christ’s ministry. She is present at the Wedding Feast at Cana, when she encourages Jesus to perform his first public miracle (John 2: 1-12). Later, she is mentioned as having followed Jesus as he traveled and preached (see Matthew 12:46-50, Mark 3:31-35, and Luke 8:19-21 for three slightly different accounts of the same event).
The final mention of Mary comes in Acts 1:14, following Christ’s resurrection, when she is with the apostles in the upper room. It is commonly understood that she was there for the descent of the Holy Spirit as well (Acts 2: 1-4).