The Prefontaine Classic is a track and field meet held at Hayward Field on the campus of the University of Oregon in Eugene, Oregon, United States. Organized by the Oregon Track Club, it was previously one of the IAAF Grand Prix events, and is now part of the Diamond League. The meet is one of the few international competitions to host the imperial distances of the Mile run and 2 Mile run.

Hayward Field is a track and field stadium in the Northwestern United States, located on the campus of the University of Oregon in Eugene, Oregon. It has been the home of the university's track and field teams since 1921, and was the on-campus home of the varsity football team from 1919 through 1966. Track and field competitions at the stadium are organized by the not-for-profit organization TrackTown USA.