The website online-skating.com recently posted an interview with Yincai Luo, who skated 12,000km (7,456 miles) around the world in 9 months. The trip took him through China, Kazakhstan, Russia, Latvia, Lithuania, Estonia, Poland, Slovakia, Austria, Czech Republic, Germany, Holland, Belgium, France, Switzerland, Italy and the entire length of Route 66 in the United States before heading back to China.
12.000 km: 1.000 km in Kazakhstan, 2.200 km in Russia, 4.600 km in Europe, and 4.200 km in the USA. My trip lasted from August 2015 to May 2016, i.e. around 9 months.
Read the full interview with Yincai here.