Stade des Trois Tilleuls, Protected heritage site stadium in Watermael-Boitsfort, Belgium.

The Stade des Trois Tilleuls is a football and athletics stadium in Watermael-Boitsfort, built between 1946 and 1948. It has a covered main stand along one long side and an open concrete bowl for standing spectators on the other three sides. A six-lane athletics track surrounds the grass pitch, and the stone main building houses the clubhouse and changing rooms.

Built between 1946 and 1948 for the football and athletics sections of Racing Club de Bruxelles, replacing the too-small Stade du Vivier d'Oie, the stadium was inaugurated on 11 November 1948 with a gala match against AC Torino, which won 3-0 before 40,000 spectators. Racing left in 1954 and the municipality took ownership; RRC de Boitsfort moved in in 1960. It was protected as a monument in 2010, and renovation works were decided in 2011 for the athletics club's 120th anniversary.

The name refers to a nearby roundabout with three linden trees, on Brussels' second-highest natural point, where seven streets meet; by the early 2020s only two trees remained. The stadium now hosts RRC de Boitsfort, Boitsfort RC and the Racing Club de Bruxelles athletics club, which survived the 1963 merger of Racing's football section with White Star AC.

Access is through a stone arch at the main entrance, which opens onto two paths: the sports facilities lie to the left, a children's playground and the secondary pitches to the right. The stone main building holds the refreshment bar, changing rooms and technical rooms, with a stand built into the facade facing the main pitch. The uncovered standing terraces are no longer open to the general public.

The name comes not from the stadium grounds but from a nearby roundabout with three linden trees, on the second-highest natural point in Brussels, where seven streets meet. By the early 2020s only two trees remained, one having died.