Gravel Ritten GR1 - 71KM - Gravel BB.gpx (161 downloads ) GR2 - 65KM - Gravel BB 2.gpx (162 downloads ) GR3 - 68KM - Gravel BB 3.gpx (164 downloads ) GR4 - 65KM - Gravel BB 4.gpx (176 downloads )