(There are no car-specific events, so only one car is actually necessary to complete the series)
Just as in the LMP2 Season there are 40 events - 30 Trophy + 10 TT - shared across ten tracks, with each track hosting three Trophy events (one a Cup) and a TT. This time the track sequence is different, running Bugatti > Catalunya > Laguna Seca > Spa > Red Bull > Monza > Nürburgring > Silverstone > Mount Panorama > Le Mans.
You need to complete 2 Trophy events on a track before its TT will open, and all 3 Trophy events before the next track will open up.
PR80.8 from the Festival Race Day will get you past 75%, but the Mount Panorama and Le Mans Cup races need PR82.5 and PR83.6 respectively.
Progress Rewards split:
25% - 5GC and M$7,000 [PR74.2]
50% - 10GC and M$15,000 [PR76.5]
75% - 15GC and M$22,000 [PR80.2]
100% - 20GC and M$30,000 [PR83.6]