Jenkins won the 100-meter hurdles with a time of 15.72 seconds and won the 300-meter hurdles with a time of 46.04.
Douglass won the shot put with a throw of 35 feet, 8¼ inches, and the discus with a throw of 129-3.
Their first-place marks also helped put Jaguars girls in fourth place overall as team a with a score of 50 points, behind division champion Cosumnes Oaks (66), Oakdale (60.5) and Vista Del Lago (60).
Both girls move on to the Sac-Joaquin Section Masters meet on Thursday, May 24, and Friday, May 25, at Elk Grove High School.
Three other Kimball athletes finished in the top six in their events and will move on to Masters.
Francesca Loayza placed third in the 3,200 meters (11:50.84), Cara McClain was fourth in the discus (107-3), and Derek Van de Streek was sixth in the triple jump (43-2).
Sac-Joaquin Section Division IV-V championships
May 15 and 17
Modesto Junior College
800m: 12 Jemiyah Castro 2:33.80, 15 Anna Carrasco 2:38.58
3,200m: 3 Francesca Loayza 11:50.84
100m hurdles: 1 Chloe Jenkins 15.72
300m hurdles: 1 Chloe Jenkins 46.04
4x400m relay: 9 Kimball, Chloe Jenkins, Jemiyah Castro, Makenna Strope, Kayla Franklin 4:23.83
Shot put: 1 Jaleyah Douglass 35-08.25
Discus: 1 Jaleyah Douglass 129-03, 4 Cara McClain 107-03
300m hurdles: 11 Danny Gallegos 43.77
High jump: 13 Chandler Alves 5-09.00
Long jump: 11 James Slater 19-06.50
Triple Jump: 6 Derek Van de Streek 43-02.00
Shot Put: 7 Joe Malungahu 46-04.25