Chelsea Kimball knew she wanted to get into free ride mountain biking after she made a jump she didn't land. During the US mountain biker's first trip to Virgin, Utah in 2017, Kimball hit a big step up — a jump with a landing that's higher than the take-off — when she was still new to the trail feature. "Definitely didn't have the skills," she tells PS.

"I crashed so hard. I flew from 20 feet out of the air, straight over the bars. I got bucked and just landed like a pancake on the ground.

" Free ride mountain biking is premised not on racing to a finish, but on riders charging courses they create themselves, using natural elements like rocks, logs, and dirt. These DIY courses draw out steep drops and big jumps, which in turn demand commitment. Kimball felt scared committing to that early step up in Virgin, but she liked the feeling.

"Whether it goes well or not, that feeling of completing something new —- of venturing into the unknown, and then finishing it and coming out on the other side —- is what has always drawn me to free ride," Kimball says. This fall, Kimball will be one of eight riders from five countries to venture into the unknown in Virgin, Utah to experience a first for women's free riding: Red Bull Rampage. Since 2001, the event has taken place along the red rock cliffs that form Virgin's desert mesas.

Over the years, Rampage has become known as the most extreme event in free riding, in mountain biking, and to some, in all of action sports. And in all 17.