CrossFit ATR Mission Valley

CrossFit ATR Mission Valley

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Established in 2011 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 "b

Photos from CrossFit ATR Mission Valley's post 03/11/2026

FINAL WEEK. FINAL THROW DOWN. 🔥

The last week of the Open is here and we’re closing out the ATR Intramural Open the only way we know how… absolute chaos and community.

Join us for Friday Night Lights – Week 3 👇
Team Game starting at 6:30pm @ our Mission Valley location. Please arrive around 6pm for parking and to participate in the game.

⚡ Recovery by Reign Body Fuel
Pull up to the Biohack Bus for recovery between heats. Think red light therapy + sauna to keep you moving all night. This will be available for athletes AND spectators!

🍦 Cabetos Pops - Hand Crafted Ice Cream
Huge thank you to Doug Steiner from State Farm for bringing the sweet treats.
🍔 Funky Frenchie food truck will be on site for all of your dinner and snack desires.

🎧 Live DJ all night while teams battle it out in Nerf Gun Wars, followed by heats of the final Open workout.

Friends & family welcome, come hang, cheer, and be part of the madness.

Three weeks of showing up.
Three weeks of cheering louder.
One last night to send it.

Let’s finish the 2026 Open the ATR way. ⚡💪

Photos from CrossFit ATR Mission Valley's post 02/04/2026

Big news for the ATR fam 💥
We’re officially partnered with REIGN Body Fuel through their gym affiliate program.

From keeping our athletes fueled in the gym to showing up BIG at HYROX with free drinks and burritos (elite behavior), we’re incredibly grateful for their support of our community.

Recovery. Performance. Energy.
Thanks for backing our athletes every step of the way, 🖤⚡️

01/01/2026

Important Update – Mission Valley Location

Due to a devastating flood that impacted the entire building, CrossFit ATR Mission Valley will be temporarily closed for the next couple of weeks while repairs are underway.

The good news: classes will continue as scheduled at our Kearny Mesa location, and we’re ready to welcome all Mission Valley athletes there during this time. 💪❤️

This is a tough and unexpected pause, but we’re grateful for our community, our coaches, and everyone who has already reached out with support. We’ll keep you updated every step of the way and can’t wait to reopen stronger than ever.

Please DM us with any questions or concerns.

Thank you for your patience, flexibility, and continued support.
ATR always finds a way.

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Location

Address


5801 Fairmount Avenue
San Diego, CA
92120

Opening Hours

Monday 6am - 8pm
Tuesday 6am - 8pm
Wednesday 6am - 8pm
Thursday 6am - 8pm
Friday 6am - 8pm
Saturday 8am - 12pm
Sunday 10am - 12pm