Gigon competed at the very first World MTB Orienteering Championships in Fontainebleau in 2002, where she placed fifth in the sprint and eighth in the long distance.^[3] At the 2004 World Championships in Ballarat in 2004 she won the middle distance ahead of Laure Coupat and Belinda Allison, placed seventh in the long distance, and won a silver medal in the relay behind the Finnish team.^[4] At the 2005 World Championships in Banska Bystrica she won the middle distance and placed fourth in the long distance.^[5] At the 2006 World Mountain Bike Orienteering Championships in Joensuu she won the middle distance for the third time, placed seventh in the long distance, and fourth in the relay.^[6] At the 2007 World Championships in Nove Mesto na Morave she won a gold medal in the long distance, a silver medal in the sprint and placed ninth in the middle distance, and won a bronze medal in the relay.^[7] At the 2008 World MTB Orienteering Championships in Ostróda, she won a silver medal in the sprint, a silver medal in the middle distance, and placed sixth in the long distance. She participated on the Austrian relay team which won a bronze medal.^[8] At Ben Shemen in 2009 she won a bronze medal in the sprint, a silver in the middle distance, and placed fifth in the long distance. The Austrian relay team won gold medals for the first time, with Elisabeth Hohenwarter, Sonja Zinkl and Gigon on the team.^[9] At the 2010 World Championships in Montalegre she won a gold medal in the middle distance, placed sixth in the long distance, and eight in the relay.^[10]

Gigon also competes in foot orienteering at an international level. At the 2008 World Orienteering Championships in Olomouc she placed 31st in the long distance, and participated on the Austrian relay team which placed 22nd.^[11]

• Michaela Gigon at the International Orienteering Federation
• Michaela Gigon at World of O Runners