Virginia Mason Athletic Center, NFL training facility in Renton, USA

The Virginia Mason Athletic Center is the Seattle Seahawks' headquarters and practice facility on 19 acres along the southeastern shore of Lake Washington in Renton. The 200,000-square-foot building, the NFL's second-largest, has three floors: the first holds the locker room, weight room, auditorium and media studios; the second, coaching offices and draft room; the third, administrative offices. Four practice fields lie outside, three on natural grass and one indoors on FieldTurf.

The site once held a coal tar refinery and creosote plant. Seahawks owner Paul Allen bought the land in 2000 through Vulcan Real Estate, with approval from the City of Renton and the state Department of Ecology. The 200,000-square-foot facility opened in summer 2008 as the team's headquarters, replacing a Kirkland base used from 1986 to 2006.

The facility is named after Virginia Mason Medical Center, whose partnership with the Seahawks was expanded when the headquarters was planned. Since 2009 the team has opened training camp to the public, and a large berm beside the outdoor fields gives fans a raised spot to watch practice. International soccer clubs visiting Seattle have also trained here, including Inter Milan during the 2025 FIFA Club World Cup.

The facility is bounded by Interstate 405 to the east and Lake Washington to the west, with the Eastside Rail Corridor trail running alongside it. The on-site lot holds 275 vehicles. Public access is mainly during training camp, which the Seahawks opened to fans starting with the 2009 season; a large berm beside the outdoor fields is set aside for watching.

The indoor practice field reaches nearly 95 feet (29 meters) high, allowing trainers to work on specific football drills that require extra vertical space. This unusual height makes it possible to practice techniques that might otherwise only be developed during actual games.