Huaraz sits at 3,050m below the Cordillera Blanca's 22 peaks above 6,000m, with Laguna 69's turquoise glacial lake, the Santa Cruz trek's classic four-day circuit, and Huascarán (6,768m) as the world's highest tropical peak.
Dry season with Cordillera Blanca trekking at peak, Santa Cruz trek and Laguna 69 day walks at full activity, and Huascarán climbing window June-August.
Wet season with afternoon storms, Cordillera Blanca trails muddy and pass crossings risky, but Huaraz town stays accessible and lower elevations remain visitable.
Peak trekking with Santa Cruz, Huayhuash circuit, and Quebrada Llanganuco at full operation, plus Semana del Andinismo mid-June celebrating mountain culture.
Wet-dry transition with the Cordillera Blanca peaks visible without afternoon clouds, the Llanganuco lakes at peak photographic colour, and trail conditions improving daily.