The Los Angeles Marathon’s Legacy Runners have walked, run or used a wheelchair in every race since the event began in 1986.

Around the 15th year, Briones decided he wanted to formalize the group. He and a friend printed out stickers with an email address and brought them to the marathon in 2002.

He and a friend printed out stickers with an email address and brought them to the marathon in 2002. “We went to the race and we just started yelling out,” Briones said. “We’d stick it ...