Brian Maffly | Tribune file photo Runners push to the summit of Grandeur Peak Saturday for the annual Running Up For Air 24-hour endurance challenge in 2017. The event raises money for Breathe Utah and awareness about the Wasatch Front's poor air quality. The 125-participant race is staged out of Mill Creek Canyon's Church Fork picnic area, where runners do repeated 5.8-mile trips up and down the peak overlooking Salt Lake City. Photo by Brian Maffly.