The Harvard Climbing Wall is located in the Quadrangle Recreational Athletic Facility (QRAC) at 66 Garden St in Cambridge. It is available for use by any person with a valid Harvard Athletics membership, including family members of Harvard faculty and staff.  Your first visit to the wall is free; after that, there is a per-semester fee ($25/semester for undergrads, $35/semester for everyone else).  SEF-eligible students are eligible for a fee waiver - please indicate SEF eligibility when completing the climbing wall waiver.
Office hours are posted in the Google Calendar below. Regular hours are:

Sunday 5-9 PM
Monday 5-7:30 PM
Tuesday 5-9 PM
Wednesday 5-7:30 PM
Thursday 5-9 PM
Friday Closed
Saturday 2-6 PM

The Wall is available for group use by reservation only. There is a fee of $40/hr for group use; please email harvardwall@gmail.com to set up a reservation.