Available on Mondays, Wednesdays, and Fridays at 7:30 p.m., the rock wall at Millennium Gym (Jr. Independencia 145, Miraflores, tel. 01/242-8557) is good training for the boulders around Huaraz [1]. You must become a member to climb. Youth Hostal Malka (Los Lirios 165, San Isidro, tel. 01/442-0162, www.youthhostelperu.com [2]) in San Isidro [3] also has a rock wall.
Links:
[1] http://www.moon.com/destinations/peru/huaraz-and-the-cordillera-blanca/huaraz
[2] http://www.youthhostelperu.com
[3] http://www.moon.com/destinations/peru/lima/sights/san-isidro-and-miraflores