"Seth plans to focus on his racing opportunities in New Zealand for 2020, where he has been selected for the Yamaha off-road team, but he still may try to return to the States for another GNCC round or two," Reardon senior said.
Seth Reardon wrote on his racing Facebook page that he had no excuses.
"But I have learnt a lot from this experience and am going to build on my riding and go harder back home. After a long drive to Indiana we made it to the last round of the GNCC at Ironman Raceway here in the States (Crawfordsville, Indiana). Massive build up with over 1500 riders over the weekend.
"The track was a 45-minute loop with extreme mud and ruts and a few good hill climbs. After the three-hour race I ended up 13th in the XC2 class. I'm really grateful to everyone who supports me and has helped me get here."
Meanwhile, Te Awamutu rider and sometime North American training partner Rachael Archer was leading the women's race at the Amsoil Ironman with a lap to go before wilting to run third. She ended the meeting second in her class and sixth overall.
Fellow Kiwi, Liam Draper from Howick in Auckland, also finished second in his class and ninth overall at Crawfordsville.