The Frisian Solar Boat Challenge is a 137 miles (220 km) solar boat race. The race starts in Leeuwarden, the capital of Friesland, and follows the classic route of the Eleven City Tour. Following the canals, rivers, and lakes, with the occasional portage, the race features 40 teams from eight countries, including Belgium, Germany, Great Britain, Luxembourg, the Netherlands, Poland, Sweden, and the one long-distance entry, a team from the Federal University of Rio in Brazil.