The Ross Foundation Sooner Late Model Series has made a handful of schedule changes, including adding June 20 and Sept. 6 events at Enid (Okla.) Speedway.

The Oklahoma-based tour also dropped series events June 21 at Longdale (Okla.) Speedway and Aug. 16-17 at Oklahoma Sports Park in Ada.

Additionally, Sept. 6’s event at Caney Valley Speedway in Caney, Kan., was moved to a week later, Sept. 13.