Oregon Duck Sasha Wallace completes the final hurdle as she races towards the finish line in the semi-finals of the women’s 100 meter hurdles. Day Eight of the U.S. Olympic Trials Track and Field continued on Friday at Hayward Field in Eugene, Ore. and will continue through July 10. Photo by Katie Pietzold

Asics’ runner and former Olympian Alysia Montano attempts to run to the finish line of the women’s 800 meter final. Just before the final stretch, Montano collided with another runner and fell. Montano was unable to get up and complete the race after multiple attempts at getting back up. Day Four of the U.S. Olympic Trials Track and Field were held Monday at Hayward Field in Eugene, Ore. and will continue through July 10. Photo by Katie Pietzold

Oregon Duck Devon Allen places first in the men’s 110 meter hurdle finals in 13.03. Allen is headed to Rio! Photo by Katie Pietzold

Washington State Cougars James Williams (#32) runs in for a touchdown as Oregon Ducks defense Arrion Springs (#1) and Ugo Amadi (#14) attempt to stop him. The Cougars beat the Ducks 51-33 at Martin Stadium on Saturday evening. Photo by Katie Pietzold

U.S. Army’s Paul Chelimo jumps on Nike Bernard Lagat’s back after the two qualified for Rio in the men’s 5,000 meter run finals. Day Nine of the U.S. Olympic Trials Track and Field continued on Saturday at Hayward Field in Eugene, Ore. and will continue through July 10. Photo by Katie Pietzold

Nike’s Allyson Felix falls to the ground smiling as she places first in the women’s 400 meter finals, sending her to the Olympics for a third time. Day Three of the U.S. Olympic Trials Track and Field were held Sunday at Hayward Field in Eugene, Ore. and will continue through July 10. Photo by Katie Pietzold

Oregon Duck Devon Allen takes a breath as he gets set in the starting blocks of the men’s 110 meter hurdle prelims. Day Eight of the U.S. Olympic Trials Track and Field continued on Friday at Hayward Field in Eugene, Ore. and will continue through July 10. Photo by Katie Pietzold