alcatraz [ODbL 1.0] © contributori OpenStreetMap — https://www.openstreetmap.org/relation/3972498 ODbL 1.0 osm 2026-08-29T18:45:52Z alcatraz mtb 632.3 629.1 625.1 623.0 621.2 603.8 602.9 596.3 592.1 589.9 577.6 566.9 562.8 557.9 557.5 555.5 550.5 545.0 543.8 539.3 540.1 537.8