The disappointment didn't last long for Caitlin Collier.

The Bolles School graduate bounced back quickly at the IAAF World U20 Championships in Tampere, Finland, running a personal-best time to qualify for the final in the women's 1,500 meters Friday.

Collier finished sixth place in her heat with a time of 4 minutes, 18.40 seconds, nearly two-thirds of a second faster than her previous best at the distance. That was fast enough for the Stanford signee to qualify for Sunday's final, with one of the best times among runners outside the top four in their respective heats.

Collier responded well after her surprising exit Wednesday from the early rounds of her best event, the 800. In that event, the 11-time Florida high school individual champion finished only fourth in the semifinal and failed to qualify, despite holding the top seed time entering the competition.

In the 1,500 final, Collier enters with the sixth-best preliminary time of the 12 qualifiers. Ethiopia's Dinke Firdisa recorded the fastest time in the heats, 4:16.85.