| Monday | 9–10 AM, 5–8:30 PM |
| Tuesday | 9–10 AM, 4:30–8:30 PM |
| Wednesday | 9–10 AM, 5–8:30 PM |
| Thursday | 9–10 AM, 4:30–8:30 PM |
| Friday | 9–10 AM, 5–7 PM |
| Saturday | 10 AM–12 PM |
| Sunday | Closed |
Mixed Martial Arts Underground is an independent kickboxing studio in Crystal Lake, IL. The studio is known for its hardcore, community vibe. New members can take advantage of their intro offer: COME AND ENJOY THREE FREE CLASSES BEFORE YOU SIGN UP.
Data last verified: 2026-03-15
Own this studio? Email jess.park@sweatlocal.net to update your listing