... Search for Adventure Sports & Extreme Sports Worldwide ... Guatemala has some of the best mountain biking terrain in the world and this trip offers you a fanta... Posted on 03/19/2004 3:26:10 PM PST by veronica. KETCHUM, Idaho - Plunging into a vacation filled with extreme sports, John Kerry is tumbling and sweating through mountain conditions that even ski experts say are challenging. ... Kerry Tumbles Through Extreme Sports Trip.