Zagori Mountain Running topoguide is a digital field guide for the 4 routes of 2017 Zagori Race, ie. the Entry Race (10 km), the Half-Marathon (21 km), the Marathon (44 km) and the demanding Zagori TERA (80 km). The application provides the accurate tracking, as well as the Checkpoints, Supply Stations and kilometre markers of each race. During the race, the app warns the runner when he leaves the track and indicates the shortest way to go back. The detailed and up-to-date offline maps cover a much wider area and include all tourist information. An extended introduction on the nature and the highlights of Zagori area frame the races in their natural and cultural landscape. The application has been created in collaboration with the Zagori Mountain Running organisation committee and the support of Fifth Element. The runner can scrutinize the race through its statistic analysis (elevation, vegetation, distances), the detailed description, the checkpoints, the supply stations and the kilometre markers. His friends can explore the Zagori area with the help of the offline cartography and the navigation routes to hundreds of POIs of the wider area.