by John Rittenoure - TULSA, Okla. (March 25, 2021) - Week two of the Sooner Late Model Series is here. Gates open at Thunderbird Speedway's historic half-mile in Muskogee at 4 Friday with racing at 7:30. Saturday gates open at 3 with racing at 7:30. $1,000-to-win Friday and $2,000-to-win Saturday.