Kimberly Clements was showing off purple bruises on her biceps and legs, earned in a weekend of bike racing.

“I fell down a hill really hard,” she said, laughing about the crash with her training partners.

It was just a part of cyclocross, a growing form of bicycle racing on short, fast courses covered in grass, sand, mud and obstacles.

“I like the challenge,” said Clements, a 39-year-old marine biologist, while trying to recover from her season-opening race in Texas. “It is a big challenge.”