The encierro is not a fixed event. The same 875-meter route runs at different speeds depending on the bulls, the condition of the street, the number of runners present, and a hundred other variables that change each morning. Understanding how fast the encierro runs, and why, is essential preparation for anyone planning to run. The difference between a two-minute sprint and a six-minute marathon changes everything about how you position yourself, how you pace your run, and what kind of danger you face.
Dennis Clancey, who has measured the encierro for years and filmed it from multiple angles, explains the overall range: “The shortest runs have been under two minutes. The bulls run at a sub four minute mark base. A long run can go as long as five or six minutes.” This simple statement contains a fundamental truth about the encierro. It is not predictable. But it is not random either. The timing reveals patterns, and those patterns tell you what is happening with the herd.
Overall Encierro Timing
The encierro runs from the Santo Domingo corral to the bullring, a distance of 875 meters. A typical run takes between two and six minutes. This wide range is not a failure of the system. It is the nature of running live animals through medieval streets. Fast runs are not always better than slow runs. They simply mean different things.
Dennis notes: “The shortest runs have been under two minutes. The bulls run at a sub four minute mark base. A long run can go as long as five or six minutes.” When he says “sub four minute mark base,” he is describing the most common scenario. The bulls move quickly through Santo Domingo, accelerate through Mercaderes, maintain speed through Calle Estafeta, and reach the bullring in just under four minutes. This is the standard pace. For a detailed breakdown of this stretch, see our guide to the Mercaderes section.
A run under two minutes means the bulls moved from the corral to the arena with minimal delay, maintaining their initial acceleration from start to finish. This typically happens when the bulls are energized, the cabestros are responding well, and there are no obstacles or separated animals requiring the pastores’ intervention. The bulls run at what is effectively a gallop.
A run longer than five minutes indicates something different. The herd may be spread out. A suelto (separated bull) may have required attention. The street conditions may have slowed the animals. Or the pastores may have intentionally slowed the pace to prevent danger or chaos in a particular section.
Reading the Rockets
The encierro cannot be timed in real-time by runners in the street. There are no clocks, no announcements, no visible markers of how much time has passed. Instead, runners use the rockets. Two rockets are fired: one signals that the bulls have left the corral, the second signals that the last animals have entered the bullring.
Dennis explains the importance of the rockets to understanding timing: “One of the first indications around the timing of the encierro is the separation between the first and second rocket. You get accustomed to a certain cadence between those two rockets.” This cadence is how experienced runners know whether the run is proceeding at normal speed or whether something is unusual. As Cadena SER has documented, the pace of the encierro has direct consequences for runner safety.
The time between the first and second rocket is the duration of the entire run from start to finish. A short delay (two to three minutes) means the bulls have moved quickly through the entire course. A long delay (five to six minutes) means the herd has encountered obstacles or the pastores have slowed the pace. The rockets provide auditory timing that every runner can hear, even if they cannot see the bulls.
Dennis notes: “When there’s a long delay, you assume that the herd is gonna be very spread out, and that could mean that there are groups of bulls or there are sueltos, there’s likely to be some issue.” This is crucial. The timing is not just a statistic. It is information about what is happening with the herd. A runner who hears a long delay between rockets understands that the herd is spread out and that unpredictability is likely.
Section-by-Section Breakdown
While the overall run takes two to six minutes, the pace varies dramatically by section. Santo Domingo is typically the fastest section. Calle Estafeta is typically the slowest. The final section toward the bullring is fast again, but for different reasons than Santo Domingo.
Santo Domingo
Santo Domingo is 280 meters of steep uphill slope. The bulls exit the corral fresh, at full energy, and the uphill grade actually favors them. Their front legs are shorter than their back legs, which means they climb more naturally than humans do. The pastores want the bulls to move quickly through this section because Santo Domingo is narrow and boxed in between vertical stone walls. There is nowhere safe for runners to position themselves if the pace slows.
According to Diario AS, tracking each encierro’s timing reveals significant variation. According to sanfermines.net, “The bulls run out of a pen situated in a former bastion in the ramparts. This is a section in which the bulls run the fastest, as they are fresh and ready to run, and it is far easier for them to run uphill since their front legs are shorter than their back ones.” A typical Santo Domingo section takes 45 to 90 seconds, depending on the initial velocity of the bulls. Encierro coverage from Okdiario illustrates just how quickly conditions change when the herd accelerates.
Mercaderes and the Plaza
Mercaderes is a short, flat section at the top of Santo Domingo. It transitions from the steep slope to the open Town Hall plaza. This section typically takes 20 to 40 seconds, depending on how smoothly the herd takes the left-hand turn required to enter Mercaderes from the Santo Domingo slope.
The Plaza del Ayuntamiento (Town Hall square) is where the pace can change significantly. If the bulls are running at full speed and the cabestros are responding well, the plaza is crossed in 15 to 30 seconds. If the herd is slowing or beginning to spread out, the plaza can become a bottleneck where the pace stalls.
Calle Estafeta
Calle Estafeta is 300 meters of relatively flat ground that becomes the slowest section of the course in many runs. This is because of the 90-degree right-angle turn at the beginning of Estafeta, which is at La Curva de Estafeta (Dead Man’s Corner). The centrifugal force at this turn pushes the bulls toward the outer fencing. If a bull loses footing or separates, the pastores must respond.
Estafeta typically takes 60 to 120 seconds, depending on how smoothly the herd navigates La Curva and how spread out the animals are by this point in the run. The section is long enough that separated bulls or slowing pace significantly increases the time spent in Estafeta compared to other sections.
Final Section and the Bullring
The final section from the end of Calle Estafeta to the bullring is the shortest. It includes the Telefonica building area, the narrowing passageway, the tunnel, and the final 50 meters inside the bullring. This section is typically the fastest of the latter half of the course, taking 30 to 60 seconds. The bulls can see the bullring at this point, and they accelerate toward it. Learn more about the final meters in our analysis of the Telefonica stretch.
Variables That Affect Speed
The timing of any particular encierro depends on multiple variables that interact in complex ways. Understanding these variables helps explain why the timing changes day to day.
Bull Behavior and Energy
Different bulls have different temperaments. Some breeds are naturally faster than others. The Miura bulls, for example, are known for their aggressive speed. The Victoriano del Rio bulls are known for their steady movement. The temperament of the particular bulls running on any given day affects the overall pace.
Street Conditions
Wet adoquines (cobblestones) slow the bulls. The anti-slip treatment the city applies before fiesta helps with traction but does not eliminate the effect of water or dew on the stone. If the morning is damp, the pace will be slower. If the street is dry, the pace will be faster.
Cabestro Responsiveness
The cabestros are trained steers that guide the herd, but their individual performance varies. A cabestro that is energized and moving decisively accelerates the herd. A cabestro that is slow to respond or hesitant slows the pace.
Runner Density
Counterintuitively, the number of runners present affects the pace of the bulls. When the streets are packed with runners, the bulls have less room to move and more obstacles to navigate. This can slow the pace. Conversely, on quiet mornings with fewer runners, the bulls can move more freely.
Pastores’ Intentional Pacing
The pastores can deliberately slow or accelerate the herd by positioning themselves differently, using the cabestros strategically, or responding to particular situations. If a pastores sees danger developing, they may slow the pace. If the herd is moving too spread out, they may try to accelerate to keep the animals together.
What Timing Tells You About Herd Status
The experienced runner learns to interpret timing as information. Dennis explains: “When there’s a long delay, you assume that the herd is gonna be very spread out, and that could mean that there are groups of bulls or there are sueltos, there’s likely to be some issue.”
A run that extends to five or six minutes indicates that the pastores are dealing with complexity. This might mean:
– A bull has separated and the pastores are managing it
– The herd is stretched out over a longer distance than normal
– Street conditions have slowed the animals
– There is congestion at a particular point (usually Calle Estafeta) that is causing delay
None of these situations is necessarily more dangerous than a fast run. But they mean different things for how you should position yourself. If you hear a long delay between rockets, you understand that the herd is spread out and that you may encounter the bulls at different times and speeds than you would in a faster run.
Conversely, a run under three minutes means the herd has moved as a cohesive unit at sustained speed. The cabestros have led effectively. The pastores have not had to intervene significantly. The bulls have maintained momentum.
The Swing Doors and Containment
The city has installed swing doors at two locations on the encierro route as part of the safety infrastructure. These doors are not visible under normal conditions, but they become critical if a bull becomes separated and turns around.
Dennis explains the purpose and location: “The city has set up a couple swing doors along the run route. The first one is at La Curva de Estafeta. And the second one is towards the end where it starts to widen.”
When a bull is reversed (turns back and runs downhill), the pastores can close these swing doors to prevent the animal from running all the way back down the route toward the corral. Dennis notes: “If a bull gets turned around once it’s gone past that point, they’ll slam the swing door shut to close off the full width of the route. So the bull is limited at how far back down the run route it can go. That can help so that you don’t have a bull that runs all the way back down to the corralillo. It’s constrained.”
This containment system affects the timing of long runs. If a bull is reversed and the swing door is closed, the pastores must manage that animal within a constrained area, which extends the overall run duration.
Expert Insight: Dennis Clancey on Encierro Timing
“The shortest runs have been under two minutes. The bulls run at a sub four minute mark base. A long run can go as long as five or six minutes. One of the first indications around the timing of the encierro is the separation between the first and second rocket. You get accustomed to a certain cadence between those two rockets.”
“When there’s a long delay, you assume that the herd is gonna be very spread out, and that could mean that there are groups of bulls or there are sueltos, there’s likely to be some issue.”
— Dennis Clancey, founder of Encierro and member of La Unica Pena
Dennis emphasizes a reality that many runners overlook: the encierro is not finished when the bulls reach the bullring. He explains: “Another uncertainty is whether the bulls will continue to run around in the Plaza de Toros, the bullring, once they arrive onto the sand. This can create a lot of danger as sometimes runners think as they enter the sand, the run is over and they are safe. They aren’t safe until the bulls are corralled.”
This is a critical point. The second rocket fires when the last bull enters the bullring, but that does not mean the herd is immediately in the corrals. The bulls may circle the arena, and runners who think they are safe because they reached the sand may be wrong.
Spanish Vocabulary
Encierro (en-see-EH-roh): The running of the bulls, literally “enclosure” or “closing in.” The term describes both the event itself and the 875-meter route through Pamplona where it takes place.
Rocket (roh-KET): An explosive charge fired to signal key moments in the encierro. The first rocket signals that the bulls have left the corral. The second signals that the last bulls have entered the bullring. The rockets can be heard throughout Pamplona.
Suelto (SWELL-toh): A bull that has separated from the herd. A suelto is unpredictable and requires the pastores to intervene.
La Curva de Estafeta (lah KOOR-vah deh es-tah-FEH-tah): The sharp 90-degree right turn at the beginning of Calle Estafeta, known for the force it exerts on the herd.
Cabestro (kah-BES-troh): A lead steer that guides the herd through the route.
Manada (mah-NAH-dah): The herd of bulls, typically six bulls plus steers, that runs the encierro each morning.
Frequently Asked Questions
How long does the encierro take?
The encierro typically lasts between two and six minutes. The most common runs take just under four minutes. The timing depends on the bulls’ energy, street conditions, cabestro responsiveness, and whether the pastores need to intervene to manage separated animals or other issues.
What do the rockets mean?
The first rocket signals that the bulls have left the corral. The second rocket signals that the last bulls have entered the bullring. The time between the two rockets is the total duration of the run. Experienced runners use the rocket delay to interpret whether the herd is moving at normal speed or whether something unusual is happening.
What does a long delay between rockets mean?
A long delay (five to six minutes) between the first and second rocket indicates that the herd is spread out or that the pastores are managing a complication. This could mean a separated bull, congestion at a particular section, or deliberately slowed pace due to safety concerns.
Why is Santo Domingo the fastest section?
Santo Domingo is the fastest section because the bulls exit the corral at full energy, the uphill grade favors their shorter front legs, and the pastores want to move the herd quickly through this narrow, confined section.
Why is Calle Estafeta slower than other sections?
Calle Estafeta is longer than other sections (300 meters) and includes La Curva de Estafeta, a sharp 90-degree turn where the herd often becomes separated or slowed. The centrifugal force at the turn pushes bulls toward the outer fencing, and the long section gives the herd time to spread out.
What happens when a bull is reversed?
If a bull turns around and runs backward down the route, the pastores can close swing doors at La Curva de Estafeta or near the Telefonica building to prevent the animal from running all the way back to the corral. The bull is then managed within the constrained area.
Is the run over when the bulls reach the bullring?
No. The second rocket fires when the last bull enters the bullring sand, but the herd may still be running around the arena rather than in the corrals. Runners are not completely safe until the bulls are corralled. Some runners have been caught on the sand while the bulls were still circling.
How do street conditions affect timing?
Wet adoquines slow the bulls because they reduce traction. The city applies anti-slip treatment before fiesta, but rain or morning dew still affects the pace. Dry streets allow faster movement.
The timing of the encierro reveals what is happening with the herd. Learn to read the rockets and the delays between them, and you will understand the encierro more deeply than most runners ever will. For a detailed breakdown of each section of the route, read our guides to the Mercaderes stretch and the final approach to the bullring.