Preparing for the 2026 Valencia Marathon: Europe's fastest course
The Valencia Marathon is run in early December on a flat course by the Mediterranean where personal bests fall every year. Here is how to prepare it in 12 to 16 weeks with a plan built from your Garmin data, and what this course changes in your pacing strategy.
Last updated: 2026-09-19
Why Valencia is the race for records
The course is almost entirely flat, with under 60 metres of cumulated climb, and it loops through the city with no wind-exposed stretch. Early December temperatures sit between 8 and 16 °C at the start: ideal for holding a hard pace for three or four hours.
The practical consequence: your time will depend almost entirely on your preparation, not the terrain. It is the marathon where an ambitious goal makes the most sense, provided you validated the target pace in training.
The preparation calendar from September
An early-December race is prepared from late August or early September for a 12-to-16-week plan. If you are reading this in September, there is just enough time for a 12-week plan: the first three weeks build volume, the next six build the long run and marathon pace, the last three taper.
- Weeks 1 to 3: volume and a long run up to 90 minutes.
- Weeks 4 to 9: marathon-pace blocks, long runs from 2 h to 2 h 45.
- Weeks 10 to 12: reduced volume, paces kept, fresh legs on race day.
Your AI coach sets the length from the exact date you give it and from your current volume read on Garmin. It never starts a 16-week plan when the race is 11 weeks away.
Pacing strategy on this course
On such a regular course the classic trap is starting too fast in the excitement of the start. The plan's rule: the first three kilometres at target pace plus 10 seconds per kilometre, then target pace to the 35th, then grit your teeth without speeding up.
Schedule the plan's "Race" session on your watch: it carries the pace range per segment, and the watch alerts you as soon as you leave the zone. On a flat course, that alert is worth gold.
Frequently asked questions
When is the 2026 Valencia Marathon?
Traditionally the first Sunday of December. Check the official date on the organiser's website before entering it in your plan: it sets the number of weeks.
Can you aim for a personal best in Valencia?
Yes, it is Europe's most favourable course: flat, sheltered, temperate. Provided you have run the target pace over 15 to 20 km continuously during preparation.
How many sessions a week for this marathon?
3 to 7 depending on your plan variant. Three sessions are enough to finish; four or five to chase a time.
Ready to prepare for your marathon?
Pick your race date and weekly session count: your AI coach builds the plan and pushes it to your Garmin.
Start the marathon plan