The inclusion of the Col du Galibier at the end of Sunday's Giro d'Italia 19th stage looks in doubt because of heavy snow on the iconic Alpine climb.
Two years after it held its first Tour de France summit finish, the Galibier is scheduled to make its Giro debut this weekend.
However, because of the inclement weather atop the mountain, Giro organisers RCS may be forced to modify the route.
Work to clear the roads is underway, although light snow is also forecast for Sunday morning.
Bradley Wiggins told Cycling Weekly this morning: "If we lose days like that it could play into other people's hands better than ours."
The climbs of the Stelvio and Gavia - to be tackled during stage 19 on May 24 - appear to be faring better, with far less snow on the road.
Snow on the Galibier, May 13 (C) Het Nieuwsblad
Significantly less snow on the Stelvio, May 14
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Nick Bull is an NCTJ qualified journalist who has written for a range of titles, as well as being a freelance writer at Beat Media Group, which provides reports for the PA Media wire which is circulated to the likes of the BBC and Eurosport. His work at Cycling Weekly predominantly dealt with professional cycling, and he now holds a role as PR & Digital Manager at SweetSpot Group, which organises the Tour of Britain.
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