Mexico
These tunnels are officially forbidden for bicycles, although the guard let us pass anyway after checking we had gears (3rd tunnel is quite steep,100m height difference, when coming from Zimapan) and decent light + flashing battery rear light
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Maybe difficult for bicycles but accessible for any size of rig, 5.50m wide and 5m high. Well guarded and maintained tunnel system.
Report Check-InThese tunnels are officially forbidden for bicycles, although the guard let us pass anyway after checking we had gears (3rd tunnel is quite steep,100m height difference, when coming from Zimapan) and decent light + flashing battery rear light
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