The Pioneer Invitational is a high-school tournament hosted by Stillwater High School in Stillwater, Oklahoma. The event ran for three iterations in the 2017-18, 2018-19, and 2019-20 seasons, before being halted by the COVID-19 Pandemic; it returned with a fourth installment in February 2023.
|2017||Norman North A||Edmond North A||Edmond Memorial A||Norman North B||IS-168|
|2018||Norman North A||Bridge Creek||Norman North B||Norman North C||IS-177|
|2020||Norman North B||Norman North A||Plainview||Jasper (TX)||IS-193A|
|2023||Edmond North A||El Reno A||Vinita||Edmond North B||IS-220A|