Tonight, under the bright lights of Pasadena City College's Robinson Stadium, Caltech will defend its title as champion of the Pasadena Collegiate Field Tournament. From 6:30 to 10 p.m., schools of higher learning from around the city will compete in bouts of skill, creativity, and athletic prowess, in events such as the Amazing Russet Race, the Frisbee Touchdown Toss, and Monster Croquet. Admission is free. After the tournament, Caltech will host a barbecue outside Chandler Café for all competitors and fans.