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 . You must become a member to climb. Youth Hostal Malka (Los Lirios 165, San Isidro, tel. 01/442-0162, www.youthhostelperu.com ) in San Isidro  also has a rock wall.