Since 2005, DIABLO has focused on our concise mission: “make our clients fit beyond expectation.” The result is an amazing gym with beautiful facilities, programs for beginners and experts, talented Coaches and a fun, welcoming community of members.

At DIABLO, we thrive on the amazing physical transformations of our every-day members who come to us to lose weight, get strong, train for an event, or simply improve their health, including first-time exercisers, weekend warriors, grandparents, stay-at-home parents, and students. And, we celebrate and learn from the incredible achievements of the many competitive athletes who also train with us.

We believe that proper movement & body mechanics and strength training are essential to longterm fitness success, injury prevention and metabolic engine performance. A strong body that moves well leads to a better, longer, happier life.


Crossfit is a type of training that will make you stronger, fitter, tougher, more toned and build muscle across a wide range of different exercises. It uses varying degrees of intensity and timing in order to test your body in different ways. Crossfit is perfect for individuals who love a challenge, get bored by traditional routines, and enjoy learning new skills and want to look good, feel great and take pride in their health and fitness.

CrossFit uses functional full body exercises from weightlifting and gymnastics, along with running and other bodyweight movements. It is designed for universal scalability making it the perfect application for any committed individual regardless of fitness level, experience, age or ability.


2 LOCATIONS to save you time: Pleasant Hill & San Jose.

OPEN GYM ALL DAY!  Access is crucial to maintaining any fitness program! Diablo’s  facilities are open 7 days a week from early morning to late evening most days. Combined, we have more classes on our schedule than any other CrossFit in California.

TONS OF CLASSES! Variety and quantity of classes are the key to keeping fitness interesting and fun. Diablo offers more than 150 classes a week beginning at 5:00 am and ending at 9:00 pm during the week. Our locations are open on Saturdays & Sundays as well.


Fitness equals wellness. If you are injured, excessively sore or overly tired as a result of your exercise regime, then you are not “fit.”

The design of the Daily Workout is the MOST important difference between CrossFit boxes. CrossFit works, fast. But, more CrossFit does not equal better CrossFit. Excessive repetitive movements, improper scaling, or complex exercises under fatigue can leave people sore and possibly injured.

Diablo has been programming & tracking CrossFit workouts for clients since 2005. We have collected tens of thousands of results from members. Those results, along with ongoing client & Coach feedback has helped Diablo create incredibly effective workout programming for ALL of our clients, including our beginning members, our masters, our teens and top athletes.

Our Head Coach and his support team create the daily workouts for Diablo members and our competitive athletes. There are also many affiliates and individuals outside of the area that follow our Daily Workout and have for years. Our programming includes strength training which helps build a solid foundation for conditioning workouts (and daily life activities!). We also include accessory and flexibility exercises to improve our members’ mobility and athletic skills. Finally, every session ends with intense and fun conditioning workouts that build stamina and endurance.

The quality of our workout programming is measured by the amazing results of our members. We encourage you to come in and talk to them – they enjoy sharing their success.


Here, our coaches practice what they preach. Every single coach on our staff, including the owners, were doing CrossFit on their own before becoming a coach with Diablo. Our coaches know what the customer experience is like because they were all clients. They are passionate about fitness, nutrition and the CrossFit methodology. They constantly devour information, videos, books, and blogs on everything related to fitness, nutrition and CrossFit. They pursue new Certifications every year. They compete regularly in CrossFit competitions, triathlons, 10ks, marathons, and more. Learn more about our coaches on our Team page


Diablo offers more than 100 classes per week, far more than most other gyms. Our classes compliment you (and your family’s) CrossFit routine: Olympic Lifting, Conditioning, Mobility, Accessory, and Core. We also have a weekly invitation only Competitive class for those looking to compete at Regionals and the CrossFit Games. For experienced CrossFitters, we also offer open gym, all days in most of our locations.


CrossFit is known for its supportive, welcoming and generous community. Attend any CrossFit event or visit a CrossFit affiliate anywhere in the world and you’ll find like-minded people eager to welcome you to CrossFit and share their experiences. Likewise, at Diablo, our community is incredibly welcoming and supportive – always willing to offer advice, coaching and encouragement. The Diablo community has become legendary at CrossFit events, dominating the crowds with chants of support for Diablo athletes.


Diablo CrossFit is a family owned business founded in 2005 and the 47th CrossFit Affiliate in the world – out of 14,000+! Owners Craig and Yvonne Howard have been married 26 years and are passionate about family, fitness, nutrition and CrossFit. They are deeply involved in the business and maintain competitive-level fitness – both have competed in the CrossFit Games two times as Masters Athletes, including a 1st place finish for Craig in 2013 (M50-54) and 4 Games qualifications for Yvonne (’11, ’12, ’13 & ’17).

Diablo began with 3 friends in a backyard in 2005 and moved to a small mechanic’s shed in Walnut Creek in ’06.  We kept a “Karma Jar” on a shelf to help cover expenses and posted a blog with our daily workouts. And, when Diablo members started sharing their fitness and love for CrossFit, we grew – fast.

In 2009, Diablo CrossFit moved to a warehouse in Pleasant Hill, expanding rapidly with showers, a fully stocked Pro Shop, meal services, a dedicated Open Gym and Olympic Lifting area and, of course, more room to CrossFit.

Diablo’s amazing community grew from our “frontier” spirit: we ventured past the boundaries of traditional fitness gyms into the exciting wilderness of CrossFit and functional fitness. And, as the CrossFit world expanded and offered competitions to test fitness, many of our member athletes participated: and excelled. Many Diablo athletes and teams have participated in the CrossFit Games almost every year since its inception in 2017. Diablo CrossFit is a well-known name in the global CrossFit community as a result of the performance of our top athletes.

Today, Diablo has two locations: Pleasant Hill and now, in San Jose (formerly CrossFit Moxie) with beautiful facilities, expert, passionate coaches and very welcoming communities. Come, be part of the legacy.