At U.S. Olympic Marathon Trials, It Was All About the Shoes

Galen Rupp leads Nike sweep of men’s qualifiers, while Aliphine Tuliamuk wins close women’s race

In the wake of record-breaking times from runners wearing Nike’s Vaporfly shoes, and new regulations from the sport’s governing body, brands are racing to roll out new shoes ahead of the Tokyo Olympics. Photo: Craig Ruttle/AP Photo

ATLANTA—Galen Rupp reasserted himself as the top U.S. men’s marathoner, and Aliphine Tuliamuk edged out her competitors to finish as the top woman in Saturday’s U.S. Olympic marathon trials, a race that played out against the backdrop of an arms race in shoe technology.

Rupp pulled away in the final miles on a blustery day, showing the speed that won him the bronze at the 2016 Rio Olympics, to finish in 2:09:20, more than 42 seconds ahead of Jacob Riley. Abdi Abdirahman was third, and at age 43 will be the oldest American...