The Cold
Cold Plunge in Boulder - Three Plunges from 38°F to 70°F
From a beginner-friendly 60°F entry point to a 38°F deep end - three cold plunges for every experience level. No gatekeeping. Start where you are.
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Plunge Details
Our Cold Plunges
COLDTUB - The Deep End
Single-person, 38 degrees. This is the real cold plunge. For experienced plungers who want maximum cold exposure.
Grizzly Desert Plunge - Mid-Range
The sweet spot. Cold enough to feel it, warm enough that most people can hold for 2-3 minutes comfortably. Room for two.
Grizzly Desert Plunge - Beginner-Friendly
Never cold plunged before? Start here. 60-70°F is cool enough to get the benefits without the shock. A perfect entry point.
Benefits
Why Cold Plunge?
Read the Full ScienceRecovery and inflammation
Cold exposure can be a practical post-training reset.
Mood and mental clarity
Cold water can create a clear before-and-after feeling in the body.
Immune support
Cold exposure can be part of a broader resilience routine.
Stress resilience
The practice trains calm breathing under pressure.
Sleep
Used thoughtfully, cold exposure can support a more balanced recovery rhythm.
Energy and alertness
A plunge can create a sharp shift in attention and energy.
What To Expect
What to Expect
Take a breath, step in, and stay as long as you can. Most people start with 30 seconds to a minute and build from there. The 60°F plunge is a great starting point - you'll feel the cold without the gasp. Between rounds, warm up in the sauna or at the bar.
First-Timer GuideFAQs
Cold Plunge FAQs
How cold is the cold plunge?
Third Space has three plunge tiers: 38°F, 43-50°F, and 60-70°F.
How long should I stay in?
Most people start with 30 seconds to a minute and build from there. Two to three minutes is common for experienced plungers.
Is it safe?
Cold plunge is intense. Start warmer, breathe slowly, listen to your body, and talk to a medical professional first if you have a relevant health condition.
Should I cold plunge before or after sauna?
Many people pair plunges after sauna rounds, but the best rhythm is the one you can repeat comfortably.
Do I need to be experienced?
No. The 60-70°F plunge is beginner-friendly and lets you start where you are.
Can I use the cold plunge if I have a medical condition?
Ask your medical professional before cold plunging if you have a medical condition or are unsure whether cold exposure is right for you.
Keep Exploring
Experience Third Space
Sauna Boulder's best sauna experience - four saunas including a Finnish-spec indoor sauna at 210°F, outdoor wood-burning sauna, and two private rooms. Drop in or join. Contrast Therapy Contrast therapy in Boulder - alternate between four saunas up to 230°F and three cold plunges down to 38°F at Third Space & Co. Recovery, mood, and energy. Social Bathhouse Third Space & Co is Boulder's social bathhouse - saunas, cold plunges, a lounge bar, and a community that keeps coming back. Not a spa. Not a gym. A third space. The Lounge The lounge at Third Space & Co in Boulder - mocktails, kombucha, electrolytes, and good company. Stay after your session. The bar is half the experience. Denver Sauna & Cold Plunge Looking for sauna and cold plunge near Denver? Third Space & Co in Boulder is 30 minutes from downtown - four saunas, three plunges, a full bar, and a community worth the drive.
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Ready to Take the Plunge?
Drop in anytime or book your spot.