Fiestas Mayas Race (50th Edition) – 10K

Belgrano-Palermo (CABA) | May 25, 2026
This was the second 10K race I’ve ever run, and coincidentally, the second time tackling this exact same course. This time around, I arrived at the starting line feeling much more confident than last year. My main goal was simply to run and cross the finish line, though I had a sneaking suspicion I might be a little faster this time.
To keep a relaxed pace, take photos, film, and truly enjoy the experience without pressure, I decided to start with the very last corral. Slowly but surely, the flow of runners carries you along; you start finding your rhythm, weaving through spaces, and speeding up or slowing down as needed.
This year’s turnout was massive compared to last year. Being the historic 50th edition, the event was highly advertised and boasted record-breaking numbers: 15,000 spots completely sold out and 120 elite athletes leading the pack. Before crossing the starting arch, we were treated to a live performance by the Argentine Navy band, and the entire course was packed with "entertainment points" and musical acts that kept the energy high.

Weather & Strategy
For this race, I ditched the hydration bladder and opted for a hydration backpack instead—using it strictly to store my light jacket and thermal shirt. I took the shirt off right before the gun went off since it was 12°C (53.6°F). It was quite humid, and as any runner knows, a prolonged 10-kilometer effort generates a lot of internal heat. High humidity makes sweat evaporation difficult, leaving your skin and clothes feeling damp. For a recreational runner, this can easily lead to heat and sweat buildup.
When I hit the hydration station, they handed me an open bottle. I managed it over the next two or three kilometers, taking small sips before finally discarding it. As you can see in the photos, the weather stayed overcast for the entire duration of the race.

The Numbers & Race Timing
After passing through all the checkpoints (1K, 5K, 6K, 7K, 8K, and 9K), here is how the clock stopped:

•    Finish Line Crossed: 09:05:07 AM
•    Gun Time (Official): 01:05:07
•    Net Time (Chip): 00:54:48

A new personal record in the 10K! Dropping from 58:18 (May 2025) to 54:33 (May 2026) means I shaved nearly 4 minutes off my previous time. In running, an improvement of that magnitude within a single year is a clear indicator that consistency on the asphalt is paying off. It shows a real upgrade in aerobic endurance and stride efficiency (sustained pace and high cadence).

Deep Dive: Performance & Data Analysis
Analyzing the data in detail reveals some fascinating insights into how my body handled the effort:
1. Pace Stability
The speed graph shows that I stayed almost surgically between 9 and 10 km/h the entire time. There were practically no pace variations, demonstrating excellent energy management and a highly consistent performance.
2. Heart Rate & Intensity (Effort Zones)
This is by far the most interesting part of the analysis. I maintained a high cardiovascular intensity throughout the entire route:
Metric    Value
Average Heart Rate    155 bpm
Min / Max Heart Rate    100 bpm / 178 bpm

•    Behavior: There was an initial spike in effort at the start, hitting 178 bpm within the first 10 minutes. After that, my heart rate stabilized into a high plateau, fluctuating consistently between 150 and 160 bpm.
•    Time in Zones:

o    Anaerobic Training: 27 minutes and 44 seconds.
o    Strenuous Exercise (Red Zone): 26 minutes and 27 seconds.

Cardiac Conclusion: I spent practically 99% of the race in high-intensity zones (anaerobic and threshold/strenuous). This indicates a brisk, demanding pace for my current physical condition, essentially keeping the "engine" revved high from start to finish.
3. Cadence & Stride (Step Frequency)

•    Average Cadence: 167 spm (steps per minute)
•    Maximum Cadence: 169 spm

The yellow graph is completely flat. From minute 2 until the finish line, I maintained an identical mechanical cadence. A cadence of 167 is solid and healthy (creeping closer to the optimal ideal of 180), which is great for preventing injuries by avoiding excessively long, heavy strides.
Runner Profile Summary
The data paints a picture of a runner with a highly controlled, regular, and consistent pace. I was able to sustain a high cardiovascular effort continuously for almost 54 minutes without "bonking" or fatiguing to the point of slowing down. All in all, a incredibly solid run!
 

Wikiloc track: https://es.wikiloc.com/rutas-carrera/fiestas-mayas-race-50th-edition-10k-belgrano-palermo-caba-05-25-2026-269112728