Garrett Grist will start the first Pro Mazda race at Mid-Ohio from pole position.
The Canadian led the first half of the session and stayed there for the second runs as well, despite being unable to improve until the final minutes, when a flyer extended his lead to almost two tenths.
Still chasing a first pole since the season opener at St. Petersburg, Neil Alberico had to settle for second.
Timothe Buret was third fastest, followed by championship leader Santiago Urrutia, who managed to edge runner-up Weiron Tan and Florian Latorre by less than two and three hundredths respectively.
Juncos duo Will Owen and Jose Gutierrez qualified seventh and ninth with Victor Franzoni between them.
The top ten was completed by Patricio O’Ward, a podium finisher in the last three races.
Full results to follow