tl;dr: Kelsey Pfendler, a Grand Canyon river-rafting guide, rowed solo from Monterey, California to Honolulu in under 44 days, becoming the first US woman to complete the 2,400-mile crossing. Her time appears to break both the previous women's record (86 days) and men's record (52 days), per the Ocean Rowing Society International. She documented the journey on social media, sharing challenges like blistered hands, sleep deprivation, and unfavorable currents.