Jolly covered the 3.1-mile course in 18:55, which was 1:48 behind the winner, James Bowens of Marshall County.
Zeke Wright finished 57th (21:57) for the Wildcats, who did not field a complete varsity team.
For the gals, Taylor Bryant finished 57th in a time of 30:15, while Rachel Cronin was 67th in 36:03.
Trigg County had a couple of strong showings in the middle school 4K races, with Shakandice Malone finishing second in a time of 17:35. LaNease Byers finished 27th (21:38); Katylin Schiaco finished 40th (28:22); and Benna Matlock was 41st in a time of 28:23.
In the boys' middle school race, Romaine Cunningham finished second in a time of 15:31. JaKelzie Martin was 26th (17:45), followed by Alex Peacock in 38th (18:58), Matthew Brokering in 50th (20:52), and Duncan Mangles in 58th (28:25).
The middle school boys were the only Trigg team with a complete score as they finished fifth with 119 points.
Trigg races again Thursday against Dawson Springs at the Lake Barkley Airport course.