B3 MTB track "Costamagna" [ODbL 1.0] © contributori OpenStreetMap — https://www.openstreetmap.org/relation/4149624 ODbL 1.0 osm 2026-08-29T18:45:52Z B3 MTB track "Costamagna" mtb/gravel 319.7 321.1 321.8 321.8 319.4 318.1 316.6 317.8 320.6 322.2 321.2 315.6 318.6 320.2 320.3 310.8 310.7 308.2 312.0 312.7 319.4 317.8 322.3 321.9 324.2 328.6 332.3 332.2 333.8 338.6 340.1 340.4 340.8 340.2 342.0 343.2 342.3 345.8 346.9 347.8 347.9 345.1 342.2 331.2 326.1 328.8 317.7 317.3 319.2 318.2 318.8 318.7