The East Link Extension, also known as Line 2 (officially the 2 Line), is a future light rail line serving the Eastside region of the Seattle metropolitan area in the U.S. state of Washington. It will be part of Sound Transit's Link light rail system, running 14 miles (23 km) from west to east and serving 10 stations in Downtown Seattle, Mercer Island, Bellevue, and Redmond. Line 2 is scheduled to open in 2024 and will continue into the Downtown Seattle Transit Tunnel and share stations with Line 1. A 3.7-mile-long (6.0 km) extension to Downtown Redmond with two additional stations is scheduled to open in 2025.