Registration is now open for Friends of Hoyt Park & Pool’s tenth annual TOSA Youth Tri. Held on Saturday, Aug. 8th, up to 250 competitors ages 9 to 17 will show their athletic abilities in a safe and fun setting.  Participants choose from two categories: FUN, which includes a 100-yard swim, 2-mile bike ride and a .6-mile run, or CHALLENGE, which is a 200-yard swim, a 4-mile bike ride and a 1.2-mile run. The course includes stages from TOSA Pool to the Menomonee River Parkway to the Oak Leaf Trail and through Hoyt Park.