2018 Summer Nationals (Irvine, California)
In Irvine, Denigan placed 6th in the 800 free (8:28.15), 10th in the 400 IM (4:40.62), 21st in the 400 free (4:14.71), and 7th in the 1,500 (16:19.29). For her placings, Denigan earned a spot on the 2018 Jr Pan Pacs team and the 2019 Pan American Games team.
2018 Jr Pan Pacific Championships (Suva, Fiji)
In Fiji, Denigan placed 2nd in the 800 free (8:30.01), 2nd in the 400 IM (4:41.39), 3rd in the 400 free (4:12.59), and 2nd in the 1,500 (16:24.35).
2018 FINA Open Water Jr Championships (Eliat, Isreal)
Coming off of a 4 medal performance in Fiji, Denigan competed in Open Water Jrs in Israel, where she finished the 14-15 5k in 1:01:06.6, clipping Spain’s Janna Blaya Corrons by 0.1 at the finish to win the bronze.
2019 Open Water Nationals (Miami, Florida)
Denigan took 7th in the 10k at OW Nats with a time of 2:00:45.38.
2019 Pan American Games (Lima, Peru)
Denigan was the silver medalist in the 800 free (8:34.18). She finished fourth in the 400 free (4:12.23), missing the podium by 0.18 seconds, and also fourth in the 1500 free (16:27.50). Denigan was fifth in the 400 IM (4:48.47).