The MetroWest Regional Transit Authority (MWRTA) is a regional public transit authority in the state of Massachusetts providing bus and paratransit service to sixteen communities in the Boston MetroWest. The MWRTA was formed in 2006 and began service on July 1, 2007 with the purpose of filling a void in public transportation service in the MetroWest. Through a commitment to deliver expanded public transportation service to the business and commercial hubs across the MetroWest region, the goals and purpose of the MWRTA are embodied in its mission statement: "Build a public transportation system to deliver convenient and dependable service that enhances mobility, environmental quality and economic vitality in the region." Funding for the MWRTA comes partially from the state and local governments of the communities it operates within.

Hopkinton is a town in Middlesex County, Massachusetts, United States, 25 miles (40 km) west of Boston. The town is best known as the starting point of the Boston Marathon, held annually on Patriots' Day each April, and as the headquarters for the Dell EMC corporation.