For the 2018 Spring League, 25 high school teams are assigned to 4 conferences based on a similar number of team members.
(#) = Number of athlete’s scores used for each team to determine True Team™ scoring points earned.
| CONFERENCE 1 (6) |
| Arlington High School |
| Cascade Christian High School |
| Oregon City High School |
| Silverton High School |
| Yamhill-Carlton High School |
| CONFERENCE 2 (9) |
| Crane Union High School |
| Dufur High School |
| Echo High School |
| Pleasant Hill High School |
| Ukiah High School |
| Wallowa High School |
| West Albany High School |
| CONFERENCE 3 (12) |
| Aloha High School |
| Central High School |
| Estacada High School |
| LaGrande High School |
| Madras High School |
| Medford High School |
| Mountain View High School |
| CONFERENCE 4 (18) |
| Canby High School |
| Hermiston High School |
| Molalla High School |
| Newberg High School |
| Union High School |
| Wilsonville High School |