A 7 to 9 p.m. benefit party today at Magazine Beach Park celebrates work restoring the historic site. Roof repairs on the 1818 Powder Magazine are expected to begin soon, and this summer introduces free yoga, concerts, dance and Bread & Puppet Theater performances at the park. A free pool opened Saturday.

Over the past three years, the Cambridgeport Neighborhood Association has raised more than $400,000 to revive the Powder Magazine – the oldest structure on the Charles River – and organized more than 10 park cleanups with partners the Charles River Conservancy and Riverside Boat Club, along with organizing celebrations, exhibits and tours.

At 15 acres, Magazine Beach Park is Cambridge’s second-largest park. Cathie Zusy, chairwoman of the association’s Magazine Beach Committee, said the park, a state Department of Conservation and Recreation property, needs a playground, water feature for children, benches “and a great lawn to replace sunken pavement.”

The party at Riverside can help, they said.

The event, including wine, hors d’oeuvres, “good conversation and great views of the Charles River” takes place at the Riverside Boat Club at Magazine Beach, just across Memorial Drive from Starbucks and Trader Joe’s.

Tickets are $35 per person and are tax-deductible donations. They can bought at the door with check or cash.

For information, go to magazinebeach.org.

This post was written from a press release.