Girl Underwater by Claire Kells
That all changes when Avery’s red-eye home for Thanksgiving makes a ditch landing in a mountain lake in the Colorado Rockies. She is one of only five survivors, which includes three little boys and Colin Shea, who happens to be her teammate. Colin is also the only person in Avery’s college life who challenged her to swim her own events, to be her own person—something she refused to do. Instead she’s avoided him since the first day of freshman year. But now, faced with sub-zero temperatures, minimal supplies, and the dangers of a forbidding nowhere, Avery and Colin must rely on each other in ways they never could’ve imagined.