Sajama National Park, Bolivia, offers a high-altitude Andean adventure, best visited during the dry season (May-October) for clearer skies and easier road conditions, though it remains cold, especially at night. While public transport can reach Sajama village, exploring the park's geysers, hot springs, and trails often requires a 4x4 or guided tour for safety and accessibility; climbing Nevado Sajama mandates experienced guides. Expect an entrance fee of approximately $15-20 USD, with daily costs varying widely based on transport (private tours significantly more expensive) and basic accommodation around $7-15 USD/night. A typical visit duration is 2-3 days to see key sites, or 4-7 days for extensive trekking or peak attempts. Crucially, travelers must acclimatize to the extreme altitudes (village ~4,200m) to avoid altitude sickness, and facilities are minimal, necessitating preparedness with cash, warm clothing, and essential supplies.