WHO RUNS IT: Tusk Trust
This hilly marathon through Lewa Wildlife Conservancy has raised more than $3 million for conservation projects. In addition to trip cost, overseas participants in the June 29 race pay a $1,500 entry fee, which goes to Tusk, a U.K. non-profit devoted to protecting African wildlife. The eight-day trip includes training runs and game drives (June 23–30; $2,799 per person). Slow of foot? Opt for Uncharted Outposts’ Conservation Safari, an 11-day adventure through Lewa, the luxury camp Sarara, and the Masai Mara ($8,995 per person; reference UNCHARTEDCONS2013 when you book to donate five percent of the cost to Tusk).