Brand Certified
Central Rock Gym - Harvard Square
4.4(122 reviews)
Certified by Central Rock Gym - Harvard Square • May 17, 2026
Business Details
20 Brattle St., Cambridge, MA
02138, United States
Certified by Central Rock Gym - Harvard Square • May 17, 2026
(617) 714-3024
Certified by Central Rock Gym - Harvard Square • May 17, 2026
https://centralrockgym.com/harvard-square/
Certified by Central Rock Gym - Harvard Square • May 17, 2026
About
Certified by Central Rock Gym - Harvard Square • May 17, 2026
Rock Climbing Gym
This bouldering-only indoor rock climbing facility offers the best climbing, fitness, and yoga in Harvard Square, MA! Whether you're just starting your climbing journey or you're a seasoned climber, our facility welcomes everyone with open arms.
Location
Certified by Central Rock Gym - Harvard Square • May 17, 2026
Hours
Certified by Central Rock Gym - Harvard Square • May 17, 2026
Monday6:00 AM - 10:00 PM
Tuesday10:00 AM - 10:00 PM
Wednesday10:00 AM - 10:00 PM
Thursday10:00 AM - 10:00 PM
Friday6:00 AM - 10:00 PM
Saturday9:00 AM - 7:00 PM
Sunday9:00 AM - 7:00 PM
5/25/20266:00 AM - 10:00 PM
6/19/20266:00 AM - 10:00 PM
7/3/20266:00 AM - 10:00 PM
7/4/20269:00 AM - 7:00 PM
9/7/20266:00 AM - 10:00 PM
11/11/202610:00 AM - 10:00 PM
11/25/202610:00 AM - 10:00 PM
11/26/202610:00 AM - 10:00 PM
11/27/20266:00 AM - 10:00 PM
12/24/202610:00 AM - 10:00 PM
12/25/20266:00 AM - 10:00 PM
12/31/202610:00 AM - 10:00 PM
Reviews
4.4
122 reviews
5 stars
92
4 stars
12
3 stars
4
2 stars1
1 star
13
- IHIsabelle Ho5 days ago4.0too warm. very nice route setting 4/23 though
- AAArman AApr 17, 20263.0Summary: Smells bad during/after peak hours, hot, humid, stale air. Been going to this gym ever since they opened. Until last year it was a solid 4/5 (main criticism was lack of dedicated changing rooms and/or hooks in toilets for changing). But now they did something to their AC system and there just seems to be no air circulation. I would rather take the T and go to Alewife location.
- MCMadison CollinsApr 3, 20261.0I have been a member at CRG for about 3 years now and constantly show up at 6am when the gym is “supposed to open”. There are more times than I can count when the gym staff is not there at 6am to open the gym. They usually show up 1-1.5 hours late. They advertise they do free coffee and bagels the first Friday of the month but today no staff ever showed up. That is very unprofessional and not fair to the community, bagel shop, or coffee shop who prepared the orders. This is unacceptable and extremely frustrating when climbers plan their commute and bring their work bags to find out the gym isn’t even open when they advertise they open at 6am on Monday and Friday. The is the most unreliable gym I have ever been too. I am very disappointed in the CRG Harvard management. Please hire employees who show up to work on time. There is typically 10 climbers every morning waiting to get in and then we end up leaving because no workers ever show up. There should be some type of compensation refund when we are paying for the gym to be open. If you are looking for a reliable gym DO NOT GO TO CRG HARVARD IN THE MORNINGS. Do better CRG Harvard.
- JSJ SmithMar 19, 20265.0So much fun! Awesome yoga!
- IIIainMar 8, 20262.0Something is wrong with the ventilation, the air is THICC with humid chalk feet stench. Do not come here until they fix it.
Frequently Asked Questions About Central Rock Gym - Harvard Square
Do I need a Participation Agreement?
Yes, you need a Participation Agreement! Climbing is an inherently dangerous sport. We require a Participation Agreement from every visitor to the gym in order to stay in operation and for insurance purposes.
All customers under the age of 18 MUST have a Participation Agreement signed by a parent or legal guardian. Grandparents, siblings, and teachers do not count.
I have never been climbing before, what are my options?
You have a number of options depending on the Central Rock Gym location you choose to visit.
Bouldering Only Facility:
You can climb on our bouldering walls. Bouldering does not require ropes, instead it focuses on shorter walls (10 – 14 feet tall) with significantly more padding on the ground. Partners are not required for this style of climbing. Check out our First Time Boulderer video for more information. A short bouldering orientation from a CRG staff member is required for this type of climbing.
Rope Facility:
You can take an intro belay class to learn all the requirements for using the facility. This class typically takes a little over 1 hour and can be registered online. Once completed you’ll have full access to the gym and have skills to allow you to belay anywhere in the country!
Many of our rope gym locations have “Staff Belay” which is a program where our staff provide all the assistance to let you climb on ropes without taking classes. Space is limited to 4 climbers per group so pre-registration is recommended. We will pair multiple groups together until we get to the maximum size of 4 participants.
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