About Endurance PTC
The Bay Area’s Leading Science-Driven Fitness & Performance Center
Endurance PTC is more than just a gym in Mill Valley - we’re a full-service performance training center and community hub for people who want to train smarter, recover faster, and have fun doing it. Our mission is to help you build a healthier, stronger body through science-based methods and expert coaching, regardless of your experience level.
From indoor cycling and strength training to INSCYD testing, sweat sodium analysis, and VO2 max assessments, everything we do is rooted in data - but built around you.
Come visit us at our Mill Valley studio, meet our team, and see what it means to train with purpose.
Built on Science. Backed by Community.
We believe fitness should be personal. That’s why we combine precise physiological testing with tailored coaching programs to meet your unique goals, whether you're training for a triathlon, recovering from injury, or just starting your fitness journey.
Our team of personal trainers, physical therapists, and sports scientists creates a supportive environment where performance and play go hand in hand. We’re proud to serve athletes, adventurers, and everyday movers across Mill Valley, Marin County, and the broader Bay Area.
The Culture of Endurance
Yes, we’re serious about endurance training. But we’re also serious about fun. Whether it's a group ride, a studio session, or a post-workout beer, we value connection just as much as progress. Join us, and you’re not just getting a training plan—you’re becoming part of a crew that pushes hard and celebrates harder.
Why We Do It
We’ve seen firsthand how better data leads to better results - and how the right team makes the journey more enjoyable. That’s why we created Endurance PTC: to be the kind of fitness center we wished existed. One that blends the precision of testing with the power of coaching and community.
Photos courtesy of Wedge Creative