The 51st Prefontaine Classic will be staged across two days at Hayward Field on Friday 3 July and Saturday 4 July, organisers confirmed on Tuesday, with 14 Diamond Disciplines split between an early-evening session under the Eugene lights and a Saturday afternoon programme built around the Bowerman Mile and the Mutola 800m. The format change, the first time the meeting has run across multiple competition days since the Olympic Trials co-hosting arrangement of 2008, is intended to give the Diamond League's mid-summer showcase the kind of broadcast window historically reserved for the Penn Relays and the Drake Relays — a Friday night for storyline-building and a Saturday afternoon for finals.

Friday's session will run from 6 p.m. to 10 p.m. Pacific Time and includes the men's 5,000m, the women's 1500m, the men's pole vault, the women's 400m hurdles, the men's discus and the women's long jump. Saturday's window from 12 noon to 3 p.m. Pacific holds the marquee races: the Bowerman Mile, the Mutola 800m for both men and women, the men's 100m, the women's 200m, the men's 110m hurdles, and the men's high jump. Each session will run for a tightly produced 180 minutes; meet director Tom Jordan said the move was driven both by NBC's request for an Independence Day weekend slot and by the simple problem that the previous one-day format ran for over four hours and lost its rhythm in the middle hour.

Full entries will not be released until later in the spring, but Diamond League sources have indicated that the meeting holds verbal agreements from a list of athletes that, even by Pre's standards, is unusual: Sydney McLaughlin-Levrone in the women's 400m hurdles, Mondo Duplantis in the men's pole vault, Letsile Tebogo in the men's 100m, Jakob Ingebrigtsen in the Bowerman Mile, Keely Hodgkinson in the women's 800m, Femke Bol in the women's 400m, and Beatrice Chebet in the women's 5,000m. The men's Bowerman Mile field is expected to include Yared Nuguse and Cole Hocker, both of whom have publicly identified the race as their first major target after the Penn Relays.

The two-day format also creates room for two American specialty races: a Friday-evening Festival Mile open to invited US-domiciled milers ranked between sixth and twentieth in the world, and a Saturday-afternoon Tracktown Steeplechase. Both events sit outside the Diamond League scoring system but qualify for World Athletics ranking points and offer prize purses of $20,000 — the Festival Mile being a deliberate tribute to Bowerman protégé Steve Prefontaine's 1972 NCAA mile, run on the same track to a then-Hayward attendance record. Tickets for two-day general admission go on public sale on 5 May at $95 with a Friday-only option at $40.

The 51st edition will be the third Pre at the redeveloped Hayward Field that opened in 2020, and the first since organisers and the city of Eugene reached a multi-year extension last December that secures the meeting in Eugene through to 2031 with what Jordan described as a "right of first refusal" on hosting any future US World Athletics championship that lands in the Pacific Northwest. With the World Championships in Beijing scheduled for September 2027, the 2026 Pre Classic is the de facto American outdoor curtain-raiser for that build, and the broadcast double-header is, in effect, the meeting's pitch to be treated like one.