Due to concerns over red tide conditions, the Captiva Tri-Athalon has been converted to a duathlon (run-bike-run) with a quarter mile beach run to replace the swim if beach conditions allow. If the beach is not clear enough for running, it will switch to a bike-run with a time-trial start in transition.

The eighth annual tri-athalon takes place Saturday, Sept. 15 and Sunday, Sept. 16 at South Seas Island Resort, Captiva. However, Captiva Drive will be closed to regular traffic from 6:45 to 8:45 a.m. Sunday, Sept. 16 for the 10-mile bike portion of the event. Captiva-bound vehicles will be re-routed in the Santiva area of Sanibel until the bridge re-opens. The final run portion is a 5K in two loops around the resort's golf course.

The staging multi-sport events presented by Southwest Florida Events promote fitness and raise funds for local charities. The Captiva Tri benefits the Healthy School Pantry and Backpack programs at Community Cooperative Ministries Inc. Those programs provide emergency food to more than 2,000 local children each school year. In 2017, the Captiva Tri raised $35,000 even with the event canceled due to Hurricane Irma.