The triathlon will be June 2 and includes a 0.9-mile swim, 24.6-mile bike ride and 6.2-mile run. Last year's event attracted more than 750 participants, according to the South Shore Convention and Visitors Authority.
A Demo Day will be June 1, the day before the race. The expo will feature products used by triathletes and an equipment drive to support the nonprofit Tri-Masters.
Cost for registration is $155 through May 5 and then $165 until race day. For more information or to register, visit www.leonstriathlon.com.