Pioneer Amphitheatre, Performing arts center in Hayward Hills, California, US

Pioneer Amphitheatre is an outdoor amphitheatre at the north-eastern corner of the Hayward Hills Campus of California State University, East Bay, in Hayward, California. It is managed by the Sequoia Management Group and hosts outdoor concerts, university functions, high school graduation ceremonies, and serves as the university's assembly area in a disaster or emergency.

Management transitioned to Sequoia Management Group in 2004, shifting the focus from university music performances to larger entertainment productions. This change enabled the venue to attract major touring artists and festivals to the campus.

The Stone Soul Picnic festival brings Urban Adult Contemporary, soul, and R&B artists to perform here, drawing crowds who come to experience live music in the open air. This event has become a regular gathering for fans of these music genres.

The amphitheatre sits at the north-eastern corner of the Hayward Hills campus of California State University, East Bay. It also serves as the university's assembly area in the event of a disaster or emergency, so it may be closed to visitors during drills or alerts. Check campus notices before planning a visit around an event.

The May 2004 Stone Soul Picnic was the seventh edition of the picnic overall but the first held at this amphitheatre, and it featured The Isley Brothers, Teena Marie, Cameo and Rick James. Isaac Hayes performed at later editions.