40th Greenfield Triathlon modified format due to unswimmable river, featured sprint race wins by Hermans and Reino, and international wins by Rabasco and Maximenko.

40th Greenfield Triathlon featured a different format due to unswimmable Green River Swimming Area. The sprint races saw Magnus Hermans and JoEllen Reino win, with Hermans clocking 1:03:08 and Reino securing her 10th straight win at 1:12:06. The international triathlon's winners were Matt Rabasco and Cassandra Maximenko. Despite changes, competitors praised the race's organization and community atmosphere.