UCI Marathon Series - O-Tour Bike Obwalden 2012 Comments Latest News from the Race Buchli and Nussli win in Obwalden O-Tour Bike hosts a round of the UCI marathon world series Races UCI Marathon Series - O-Tour Bike Obwalden 2012 9 September 2012 | Obwalden, Switzerland | XCM Marathon - Buchli and Nussli win in Obwalden 2012-09-09