About
About Us All In. CrossFit Potrero Hill In 2009, two friends heard about CrossFit for the first time and challenged each other to a WOD (Workout Of the Day) named Murph . Over an hour later, they finished and slumped to the ground. A workout had never exhausted them quite like that. This led them on a search to find the answer to a simple question: What is CrossFit? Within a few months, CrossFit Potrero Hill opened in the back of World Gym at the bottom of Potrero Hill in San Francisco.