From a press release:

Pacific Track Time announces 2003 event schedule!

March 17 (Monday) – Streets of Willow Springs

March 31 (Monday) – WSIR (Big Track)

April 7 (Monday) – Thunderhill Park

April 14 (Monday before WSMC) – WSIR Big Track

April 15 (Tuesday) – Streets of Willow Springs

May 12 (Monday) – Thunderhill Park

May 13 (Tuesday) – Thunderhill Park

May 31 (Saturday) – Laguna Seca

June 9 (Monday before WSMC) – WSIR Big Track

September 1 (Labor Day Monday) – Thunderhill Park

September 2 (Tuesday) – Thunderhill Park

September 15 (Monday before Toyota 200) – WSIR Big Track

September 22 (Monday after Toyota 200) – Streets of Willow

October 13 (Monday before WSMC) – WSIR Big Track

Fall Laguna dates TBA soon