From Lleida · 41.62° N · 0.62° E
Four getaways with a night away and three day trips from Lleida for 12 October, the Pilar and National Day: Guara with the warm water of late summer, the Lakes Train in its last month, the Priorat after the harvest and the Montsec sky at dusk.
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September and October are the other good season for the Guara canyons, with less flow than in spring and the water less cold. 12 October is a big festival in Aragon: book the canyon, walkways and table weeks ahead.

October is the last month of the Lakes Train, which closes its season at the end of the month, and the Pilar is among its most requested Saturdays. Buy the ticket as soon as sales open, and book the Sunday via ferrata first.

After the harvest the Priorat vines begin to turn yellow, and the Siurana kayak opens on autumn weekends. The 4x4 route goes out with a single vehicle: on the long weekend, it is the first thing to book.

In early October, in Gratallops, the grapes are already in the tanks and the winegrowers have time to show the vineyard. Tastings are not held on Wednesdays: if the 12th falls that day, swap it for the next day.

In October it gets dark earlier and the Astronomical Park session starts at a time that lets you get back to Lleida for dinner. The time changes with sunset: check it for your date and buy the pass beforehand.

In October the Parrizal is toured without August's heat and with the river already calm. The ticket is cheaper than in summer, but on the long weekend it sells out: buy it with a time, and remember that dogs are not admitted.

With the harvest just finished, the Penedès cellars show the grapes fermenting. The hotel serves its gastronomic menu on the eve of holidays, so on 11 October too: book the table with the room.
Questions
Yes: the season lasts until the end of October. Buy the ticket in good time.
Yes, because it is a big festival in Aragon. Book canyon and accommodation weeks ahead.
Geocaliahttps://www.geocalia.com/en/spain/catalonia/lleida/getaways/pilar-long-weekend