With over 15 acres of open space, Foss Park is Somerville's largest park by far, and it's also one of the two oldest. In 1876, it was founded as Broadway Park. Today, its grassy expanse is flanked by busy McGrath Highway and Broadway. It's home to a well-equipped playground, soccer fields, several baseball diamonds, and tennis and basketball courts, as well as a DCR swimming pool and spray pool that offer free admission. An annual Foss Fest summer concert is held, as are yearly community clean-ups.

In 2002, the Friends of Foss Park formed to address neighborhood concerns about park conditions. In the years since, improvements made include landscaping, solar trash compactors, sidewalk repairs and new flower beds, as well as stepped up pool and tree care. In 2008, the state approved $2 million in funds to renovate the park, but the money has yet to be allocated by the Governor. One item on the renovation wish list: the creation of state-of-the-art multi-use playing fields.

The park is owned by the state's Department of Conservation and Recreation.