The Tropic Air 10to4 Mountain Bike Challenge is the largest cycling event in Kenya. Each year, over 400 cycling and conservation enthusiasts come from across the globe to explore the vast Mount Kenya landscape and challenge themselves to conquer the mountain. The proceeds for this event are channeled towards conserving the Mount Kenya ecosystem and supporting the wellbeing of the communities who depend on it. These projects are implemented through Mount Kenya Trust (MKT), a Kenyan based Non-Profit Organization that works to protect, preserve, and enrich the Mount Kenya ecosystem through communities and in collaboration with government agencies and other organizations.​