The Alto Tajo month by month
The Alto Tajo in September: the red deer rut begins
September is when the red deer rut (la berrea) begins in the Alto Tajo: from mid-month, deep bellows from competing stags reverberate along forested valleys at dawn and dusk. Temperatures ease, summer crowds disperse, raptors migrate southward, and early autumn fungi emerge after rains.
- Red deer rut
- Raptor migration
- Early wild mushrooms
- Mild nights
- Fewer visitors
- Avg. max (°C)
- 23 °C
- Avg. min (°C)
- 11 °C
- Rainfall (mm)
- 40 mm
- Frost days
- 0
Average of 110 atlas villages (ERA5, 2015–2024). The coldest in september is Labros (10 °C average minimum) and the mildest, Trillo (26 °C average maximum).
The deer rut
Mature stags gather harems of hinds and challenge rivals with resonant roars audible across several kilometers. Activity intensifies during the second half of the month, concentrated at dawn and dusk.
Birds
Autumn migration is underway: Egyptian vultures, bee-eaters, and other summer residents depart toward Africa, while the skies see passage of migrating raptors.
Mushrooms
With early autumn rains, the first Boletus and saffron milk caps (níscalos) can fruit, though the main flush arrives in October.
Practical tips
To listen to the deer rut, arrive before twilight, keep quiet, and stay on established roads or viewpoints: never approach animals or trespass on private property.
The night sky in september
Pleasant evening temperatures with the Milky Way high overhead at nightfall, and steadily lengthening nights. The autumn equinox falls around 22–23 September.
Traces of time in this season
The season changes how you see these places. Their stories belong to other scales of time: from the formation of the landscape to the work and lives of those who inhabited it.
Hundido de Armallones: the rock collapse that dammed the Tagus
Armallones, Ocentejo
Orea
Guadalajara · 17 places
Barranco de la Hoz: the red canyon of the Gallo River
Corduente, VentosaContinue reading: Before us.
To visit: These are landscape suggestions, not guaranteed deer rut spots. Observe from paths without approaching wildlife; in bad weather prioritize villages.
Check the conditions on each guide or start with the getting started guide.
Preguntas frecuentes
When does the deer rut begin in the Alto Tajo?
The red deer rut in the Alto Tajo typically starts in mid-September, peaking between late September and the first week of October.
What time of day is best to hear the rut?
Chiefly at dawn and around dusk when stags are most active. On quiet, cool nights bellows can also be heard throughout the dark hours.