Vuelta a España stage 20 preview: Career defining D-day awaits Mas on Collado del Alguacil

You'll be hard-pushed to find many more difficult penultimate stages in Grand Tours than what awaits Enric Mas and the Vuelta peloton on stage 20. 

The Spaniard who looked set to be the eternal nearly man is on the cusp of Vuelta glory, and is looking every bit like a Grand Tour champion in waiting. 

However, as close as he is to the finish line in Granada, stage 20 is a monster of a mountain day and has the prowess to flip the script if Mas shows any signs of cracking. It's set to be an epic stage as the fight for the red jersey draws to a close.

Key information:

• Start: 12:30 (CET)
• Estimated Finish: 17:16 (CET)
• Stage type: Mountain
• Stage length: 186.8km
• Elevation gain: 5,041m

Follow stage 20 live at Domestique with our live reporting.

The penultimate stage of any Grand Tour is always likely to be pivotal, but the Vuelta organisers have pulled no punches in ensuring that this stage is decisive. With five categorised climbs, spread across over 500m of elevation gain.

In August, the race organisers confirmed that there had been a significant alteration made to the route of stage 20, after landslides forced the removal of the Alto de Hazallanas, which was set to feature twice. In its place is the Puerto de El Duque, which will make its Vuelta debut. 

Beginning in La Calahorra, the climbing gets progressively harder as the day grows older. After a category 3 ascent, the riders are treated to three category 1 ascents, the Puerto de El Purche twice, before the first-ever ascent of the Puerto de El Duque. 

The riders will crest the Puerto de El Duque with 31.4km remaining, before their attention swiftly turns towards the summit finish, the special category Collado del Alguacil.

The finishing climb remains the defining feature of Stage 20. Collado del Alguacil will host its first-ever Vuelta summit finish, with the 8.3km ascent averaging 9.8%, a fitting final mountain test of the 2026 edition.

• Puerto de los Blancares | 3rd category | 136.1km to go
• Puerto de el Purche | 1st category | 92.5km to go
• Puerto de el Purche | 1st category | 61.3km to go
• Puerto de el Duque | 1st category | 31.4km to go
• Collado del Alguacil | Esp category | Summit finish

Friday changed nothing at the top of the general classification, but it did reinforce the sense that Enric Mas will take some breaking. The Movistar leader starts the final mountain stage with 1:37 over Primož Roglič (Red Bull-Bora-Hansgrohe) and 3:01 over Felix Gall (Decathlon CMA CGM). 

When Roglič finally attacked inside the final two kilometres of Peñas Blancas, Mas followed without difficulty and all of the top five finished together. The Collado del Alguacil, however, is a different proposition. At 8.3km and 9.8%, it is steeper than the long, steady climbs on which Mas has looked most comfortable. 

After three second places at the Vuelta, one final mountain stage stands between him and a first Grand Tour title.

That leaves Roglič with one road left to change the outcome of this Vuelta. His attack on Peñas Blancas came too late and was answered immediately, meaning the 1:37 he needs to recover remains exactly what it was at the start of Friday. A fifth Vuelta title would put him clear of Roberto Heras as the most successful rider in the history of the race, but simply following wheels will no longer be enough. 

Saturday demands something much bigger.

The brutal gradient of the final climb should play more naturally to Felix Gall. The Austrian remains third at 3:01 after finishing alongside Mas and Roglič on Friday, and now has 1:24 to find if he wants to reclaim second place. 

The Decathlon CMA CGM has attacked on almost every major mountain day of this Vuelta without taking the time his climbing has threatened to produce. A sustained climb close to ten per cent is about as favourable a final opportunity as he could ask for.

Behind the podium, Richard Carapaz (EF Education-EasyPost) remains fourth at 5:17 after once again trying to animate the race on stage 19. 

Oscar Onley (Netcompany-Ineos) sits fifth at 6:03 and takes a 1:03 advantage over Jakob Omrzel (Bahrain Victorious) into the final battle for the white jersey. Omrzel briefly lost contact on Peñas Blancas before fighting his way back and eventually finishing six seconds behind the other leading contenders, leaving him sixth overall at 7:06.

The current gaps in the general classification mean that anyone still hoping to change the outcome of this Vuelta will likely have to make their move early. That leaves little room for the breakaway to build a decisive advantage and increases the chances of one of the GC contenders fighting for the stage win on the Collado del Alguacil.

If the break is given enough room, Santiago Buitrago (Bahrain Victorious) stands out as one of the strongest candidates. 

The Colombian came agonisingly close on Friday, attacking on Peñas Blancas and looking set for the stage win before Eddie Dunbar swept past him inside the final 500 metres. Second place still strengthened his grip on the mountains classification, while Saturday brings another five categorised climbs and a fresh chance to turn his consistency in the mountains into a victory.

There is plenty of unfinished business among the other climbers. Pello Bilbao (Bahrain Victorious) has one final opportunity to complete a set of stage victories across all three Grand Tours before retiring after Il Lombardia. 

João Almeida (UAE Team Emirates-XRG), third in the Jerez time trial, has little left to protect and can afford to race aggressively, while Lorenzo Fortunato (XDS Astana) and Andreas Leknessund (Uno-X Mobility) both fit the profile for a long day in the break. Leknessund was already sixth from the move on Peñas Blancas.

Sepp Kuss should not be overlooked either. The Visma | Lease a Bike climber has slipped out of the general classification battle and can now race with far more freedom. The American has already made clear that he has his eyes on the queen stage, and with his climbing pedigree, he is an obvious candidate to target the breakaway.

Few riders have come closer to making a mountain break stick than Georg Steinhauser (EF Education-EasyPost). On La Pandera he dropped Kevin Vermaerke inside the final 15 kilometres before being reeled in on the last climb, and a stage containing more than 5,000 metres of climbing gives the German another opportunity to turn aggression into a result.

Marco Brenner (Tudor) has already shown how to finish one of those moves. The German won on the Sierra de La Pandera after catching Buitrago on the final climb, being passed by him, closing the gap again and then beating him in the sprint. Can he do it again?

A Vuelta victory would give Valentin Paret-Peintre (Soudal Quick-Step) a stage win in all three Grand Tours. He came closest in Loja, where he finished second to Wout van Aert after sharing the work in a two rider move, and few riders have spent more days trying to infiltrate the break during this race.

Movistar also have an intriguing tactical card in Pablo Castrillo. The Spaniard won twice from breakaways on hard summit finishes at the 2024 Vuelta and has recorded the fourth most attacking kilometres of anyone in the peloton over the past three seasons. 

Friday offered another glimpse of how Movistar might use him, as Castrillo made the break on Peñas Blancas and was kept up the road as a potential reserve for Mas. On a stage with four major climbs before the Collado del Alguacil, that role could become far more important but also lead to a stage win if everything plays out.

For Mikel Landa (Soudal Quick-Step), there really is no tomorrow in the mountains. He had identified Friday as one of the reasons for staying in the race, but Peñas Blancas passed without the result he had hoped for. Saturday is the final mountain stage of his last Vuelta for the team before returning to Euskaltel-Euskadi, and one final chance to salvage something from a season he has described as the worst of his career.