Mount Nyiragongo is an active stratovolcano known for its large lava lake. Trekking to the summit is a challenging but rewarding experience, usually done with guided tours due to the remote location and security concerns. Accessibility is limited due to the rough terrain and political instability in the region. It's not recommended for solo travel; organized tours provide necessary security and logistical support. The dry season (June-September and January-February) is the best time to visit. Permits are required, and the overall cost, including permits, guides, and accommodation, can be significant. The typical trek duration is 2-3 days, including the ascent and descent. Be prepared for high altitude and volcanic activity.