2026 Tour de France Route Faces Potential Changes Following Alps Mudslides

The 2026 Tour de France faces potential route adjustments for stage 20 after two separate mudslides struck the Col de Sarenne in the French Alps within the past week. While organizers are currently monitoring the situation, the recurring damage to the road infrastructure—a key climb scheduled for the July 25 stage—has raised concerns about the feasibility of the planned route if severe weather persists.

Why the Col de Sarenne route is under scrutiny

The Col de Sarenne is a central feature of the 2026 Tour de France, serving as a critical ascent on the second of back-to-back summit to finish atop Alpe d’Huez. According to reports from the local weather service Météo Oisans, heavy rainfall following a severe heat wave triggered a mudslide on the route last week. Despite road crews clearing the debris, a second mudslide occurred on the same stretch this past Monday.

The instability of the terrain is compounded by the event’s proximity to the calendar; the amateur L’Etape du Tour de France, which draws thousands of recreational riders, is scheduled to traverse the same route on July 19, just one week before the professional peloton arrives.

How past weather events influence current planning

The Tour de France has a history of mid-race disruption due to extreme weather, which informs the current caution displayed by officials. In 2019, race organizers were forced to halt stage 19 due to a landslide blocking the route to Val d’Isere. The following day, officials cut the stage to just 59 kilometres after a second landslide hit the Cormet Roselend.

Thierry Gouvenou, the Tour’s technical director, told L’Equipe that the situation is particularly pressing this year due to the frequency of recent weather-related challenges in May and June. The organizers are balancing these environmental hurdles against the complex logistics of hosting a major sporting event, which involves coordinating with 28,000 police officers, firefighters, and gendarmes.

What safety protocols exist for extreme heat and weather?

The Union Cycliste Internationale (UCI) established formal extreme weather protocols in 2015, which were later updated to include specific criteria for heat, humidity, and solar radiation. These guidelines utilize a colour code is used to signal risks, with red noting the highest risk and organisers. At this level, they are advised to modify start or finish times, neutralise racing or cancel all or part of a stage.

Tour Director Christian Prudhomme noted in comments reported by L’Equipe that while minor adjustments—such as shortening a route by fifteen kilometers or starting half an hour earlier—are possible, they are reserved for exceptional circumstances. Because the race involves significant public infrastructure and pre-approved security authorizations, last-minute changes are logistically difficult to execute.

Historical context of heat in the Tour de France

Extreme temperatures have historically impacted both rider safety and road conditions. During the 2003 Tour, melting tarmac contributed to the crash of Joseba Beloki on a descent on a stage to Gap. More recently, in 2022, stage 15 was held as planned in 40°C temperatures, with riders being allowed extended feeding from team cars and a more generous time limit. These measures are now standard practice for the Tour, with teams utilizing support motorcycles to provide extra hydration to riders, particularly those in breakaways.