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Introducing CrossFit 858

CrossFit 858 will provide fun, top notch, community based fitness training and will help you meet YOUR individual goals. (Not your “Globo gym” or “Big Box” trainer’s goals) Whether it’s to lose weight or put on muscle, when overall fitness comes first all else will follow.

All workouts can be performed “as prescribed” or scaled to your individual capacity. Whether you are an elite athlete or a couch potato trying to get back in shape, all levels of fitness are not only accepted but encouraged. You do not have to “be in shape first” to try CrossFit.

CrossFit 858 has two locations: Miramar and Mission Valley.  We have a combined 10,000+ square feet of functional space providing functional fitness to the San Diego community.

Come in today and see what you’ve been missing out on….

Our community is waiting for you.

Latest News & Announcements

New Coaches Surveys

Hello!  We rely on your feedback to improve all aspects of operations, including coaching.

Please fill out a survey for each of the following coaches, if you have taken their classes.  The feedback will be provided in a one on one setting, and will have actionable steps to improve them along with reinforcement of the things they are doing well.

Please be as descriptive and objective as possible!  The more specific you are the better it will help them! PLEASE make sure you are clicking on the right coaches survey!

Thanks for your participation!

Coach Lisa O’Brien

Coach Michael O’Brien

Coach Jaime Lytle 

Coach Jon Hall

Workout of the Day

August 29 2015


  • Please fill out coaches surveys for Jon, Lisa, Michael, and Jaime CLICK HERE
  • CrossFit 858 MISSION GORGE is closed this Saturday August 29th and Sunday August 30th.  We are having the gym PAINTED!!  Go to the Miramar location to workout!


AMRAP 14 min

200m run

30 Double Unders (60 singles)

20 Air Squats

10 Floor Presses (135/95)