Gravel Ritten GR1 - 71KM - Gravel BB.gpx (12 downloads ) GR2 - 65KM - Gravel BB 2.gpx (11 downloads ) GR3 - 68KM - Gravel BB 3.gpx (8 downloads ) GR4 - 65KM - Gravel BB 4.gpx (10 downloads )