Mount Karthala, an active volcano on Grande Comore, offers challenging but rewarding hiking experiences. Due to its volcanic nature, accessibility can be difficult, and it is advisable to check with local guides about current trail conditions and volcanic activity before planning a visit. A guided tour is highly recommended, especially for inexperienced hikers, due to the rugged terrain and potential for getting lost. Seasonal restrictions may apply during the rainy season. The cost can vary significantly based on the tour operator, but expect to pay for permits, guides, and potentially accommodation near the mountain. A typical visit, including the ascent and descent, can take one to two days. Be prepared for varying weather conditions and bring appropriate hiking gear.