Vuelta a España stage 18 preview: Can Mas hold off Roglic in crucial Jerez time trial?

After more than two weeks of heat, climbing and attrition, stage 18 offers a very different test. The second individual time trial of the 2026 Vuelta a España takes the riders 32.1 kilometres from El Puerto de Santa María to Jerez de la Frontera on a course built almost entirely around speed.

For the specialists, it represents one of the final opportunities to take a stage victory. For the general classification contenders, the consequences could be far greater.

Enric Mas enters the decisive final days with a sizeable advantage over his nearest rivals. Felix Gall sits 2:06 behind, with four time Vuelta winner Primož Roglič another four seconds back at 2:10.

Roglič is the rider Mas will be watching most closely on Thursday. The Slovenian has repeatedly used time trials to his advantage during his Grand Tour career, while the long and largely flat roads towards Jerez suit him considerably better on paper than they do the red jersey.

Taking back more than two minutes over 32.1 kilometres would still require an exceptional ride, but Roglič does not necessarily need to erase the entire deficit. Two major mountain stages remain after the time trial, meaning every second gained in Jerez could change the complexion of the final weekend.

Key information:

• Start: 14:06 (CEST)
• Estimated finish: 17:30 (CEST)
• Stage type: Individual time trial
• Stage length: 32.1km
• Elevation gain: 217m

The first rider is scheduled to leave the start ramp at 14:06, with the race leader expected to complete the stage at approximately 17:30. Full overview of start times and order can be found here.

Follow stage 18 live at Domestique with our live reporting.

There is little shelter for riders hoping to hide any weakness on stage 18. The course is predominantly flat and contains long sections where maintaining power and an aerodynamic position should matter more than climbing ability.

The riders roll away from the Plaza de Toros in El Puerto de Santa María before heading towards Jerez de la Frontera. After around six kilometres, the route turns towards El Portal, beginning a long section where the strongest rouleurs should be able to settle into their rhythm.

The first intermediate time check comes after 11.7 kilometres. From there, the route continues through El Portal and towards Lomopardo, one of the sections where a few more changes of direction briefly interrupt the otherwise fast nature of the course.

A second time check follows after 22.1 kilometres, leaving ten kilometres to the finish. From there, the route passes Estella del Marqués before skirting the eastern side of Jerez and approaching the city from the north. Several roundabouts and turns make the closing kilometres more technical before the riders reach the long, straight Avenida Andalucía.

The wind could add another variable. Current forecasts point to a southerly breeze of around 15 to 20km/h during the afternoon. Given the general direction of travel from the coast towards Jerez, that should provide a tailwind or cross tailwind across significant parts of the course, potentially helping to produce very high average speeds.

Later changes of direction mean that advantage will not be consistent throughout the 32.1 kilometres.

Thursday’s test will be the second individual time trial of this year’s Vuelta, following the opening stage in Monaco, where Tadej Pogačar narrowly beat Ethan Hayter to victory.

• Intermediate time check 1 | 11.7km
• Intermediate time check 2 | 22.1km
• Finish | Avenida Andalucía, Jerez de la Frontera | 32.1km

The Vuelta has already lost two of the riders who would have started among the biggest favourites for this time trial. Tadej Pogačar, winner of the opening test in Monaco, and Josh Tarling have both abandoned the race, leaving the battle in Jerez considerably more open than it might otherwise have been.

Iván Romeo (Movistar) starts among the leading favourites. The Spanish time trial champion arrived at his first Grand Tour with both tests against the clock among his targets, and a flat course of this length is about as well suited to his qualities as anything on this Vuelta route.

There is an added dimension for Movistar. With Enric Mas in the red jersey, Romeo will provide the team with an early indication of how the course is riding before their leader begins the most important time trial of his carreer.

Ethan Hayter (Soudal Quick-Step) is another obvious contender. The Briton came within nine hundredths of a second of beating Tadej Pogačar in the opening Monaco time trial and now gets a much longer test on which to put his power to use.

Hayter has spent much of the Vuelta racing aggressively rather than saving himself for Jerez, including a ride that earned him the combativity award on stage 11, but his performance in Monaco showed he has the speed to challenge for victory.

Wout van Aert (Visma | Lease a Bike) also cannot be discounted. The Belgian has already won twice in the past week and leads the points classification. A long, flat time trial has not necessarily been his strongest terrain during this Vuelta, but few riders possess more raw power when the road opens up.

Team mate Bruno Armirail gives Visma another strong option for the stage.

Stefan Küng (Tudor) has the pedigree to challenge as well. The Swiss rider won the Tour de Pologne time trial in August for the 31st victory of his career and remains one of the most established specialists in the peloton.

Lennard Kämna (Lidl-Trek), Ivo Oliveira (UAE Team Emirates-XRG) and Callum Thornley (Red Bull-Bora-Hansgrohe) are among the other riders whose characteristics fit the course, although Oliveira's condition will need to be assessed after he crashed inside the final 25 kilometres of stage 16.

The biggest story, however, is likely to unfold among the final starters.

Mas leads Felix Gall (Decathlon CMA CGM) by 2:06, with Primož Roglič (Red Bull-Bora-Hansgrohe) just four seconds further back.

Gall has already played down his prospects in Jerez, saying he expects to concede around 90 seconds and pointing instead to the mountain stages that follow as better opportunities to improve his position. On that basis, Roglič has an obvious chance to move into second overall.

The more intriguing question is how close he can get to Mas.

Roglič has built much of his extraordinary Vuelta record on his ability against the clock. Finn Fisher Black recently told Domestique that the Slovenian has effectively been building through the race after being hit by a car in July, with the expectation that his best form would arrive in the final week.

Closing a 2:10 deficit over 32.1 kilometres is a very different proposition from simply taking time, but Mas is not a specialist and Thursday could leave the race leader with a considerably smaller cushion before the mountains return.

Oscar Onley (Netcompany-Ineos) will meanwhile be looking to protect the white jersey by keeping Jakob Omrzel (Bahrain Victorious) at bay in the young rider classification, while Richard Carapaz (EF Education-EasyPost) has fourth place overall to defend.

Neither is a natural specialist against the clock, so limiting their losses will be the priority.