Skip the crowded Misti trails if you want a real challenge. Pichu Pichu hits over 5,600 meters, so bring legit gear and prep for the thinning air. Spend about six hours pushing for the summit; the views of the Salinas and Aguada Blanca reserve are worth the lung burn. Don't waste money on basic tours if you lack trekking experience—hire a guide who actually knows high-altitude safety. Pack layers, it gets freezing fast.
