Kristina Fey -

The club’s signature element became the —bright, distinctive singlets that act as a beacon. When members travel to marathons in different countries, they wear the shirt. It is an unspoken invitation. “If you see someone in a RIF shirt,” Fey says, “you have a friend for the race.” The 100-Mile Obsession While Fey celebrates runners of all distances, she has a personal fascination with the extreme end of the sport: the 100-mile ultramarathon. She has completed some of the most grueling races in America, from the Rocky Racoon to the Indiana Trail 100.

"Run the mile you are in."

What started as a personal blog to process heartbreak has grown into one of the most active and beloved online running clubs in the world. But to understand the club, you have to understand the woman behind the hashtag: a runner defined not by her speed, but by her extraordinary resilience. Kristina’s story is not one of a prodigy who won state championships in high school. She came to running later in life, driven by necessity. In a short period, she endured a devastating divorce and the sudden death of her father. Grief threatened to consume her. kristina fey

In the vast, often solitary world of distance running, community is everything. For Kristina Fey, running was never just about personal bests or podium finishes. It was a lifeline, a form of therapy, and eventually, the foundation of a global movement known as Run It Fast (RIF). “If you see someone in a RIF shirt,”