Ellie Stevens accomplished her goal of winning a marathon at age 40 on Feb. 8. She followed that up by winning the Rock ‘n’ Roll Las Vegas half marathon Sunday night.

Rock ‘n’ Roll races showed an increase in entries this year. The number of runners in the full marathon Sunday jumped by 11% to 8,000 runners.

For 85 minutes, rock ‘n’ roll reclaimed its frontier wildness, ... he shed a light-blue track jacket for his trademark uniform — black T-shirt and jeans — and toweled off without missing a ...