Rachel Apa collapsed near Mile 24 and died from rhabdomyolysis, Marathon Handbook reported. Her father, Steve Apa, shared texts from the race with NBC News.

Rachel sent her first message at Mile 9, saying she felt amazing. Steve urged her to pace herself, reminding her it was her first marathon. Read more culture coverage.

As the race progressed, Rachel's messages grew briefer, ending with 'Ow, ow' at Mile 20. Steve's texts continued until Mile 24, when her position stopped moving. Related: Marathon Runner Dies After Collapsing in NYC Marathon.

This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.