A Snowy Cartel is the most accomplished of the 109 juveniles set to run in Friday night's trials for the Grade 1, $346,700-estimated Sam Houston Futurity for Quarter Horses. She goes in the 12th race, which is the last of the 11 trials being run on a program that starts at 7 p.m. Central. Each trial race will be 350 yards, which is the distance of the Sam Houston Futurity. The finale is July 2.