From Manresa · 41.73° N · 1.83° E
Three getaways with a night away and four day trips from Manresa for Sant Joan: the verbena night with the Flama del Canigó and, on 24 June, the first summer of the Berguedà, the Ripollès, the Vero and Carcassonne.
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With Sant Joan Núria's summer begins: green meadows, the lake free of ice and the longest days of the year for walking up from the valley. Buy the Rack Railway ticket online and take one of the first trains: summer is when most people go up.

At the end of June the Vero already invites you into the water and the canyon is done before the heavy heat of July and August. The walkways open ticket sales at the start of the previous month: buy those for 24 June as soon as they come out.

On the other side of the border 24 June is an ordinary day, with no verbena and no holiday road. The Cité has light until ten at night and the Canal du Midi boat sails all season: two nights are enough for everything.

The Cement Train usually runs on 24 June and the following days even if they fall midweek, before going daily in summer. The Cercs mine is cool inside: bring a jacket even if it is hot outside.

In June the Coll de la Creueta, at 1,921 metres, no longer has the gravel of spring and the meadows are full of cows and loose horses. Set off early on the 24th to avoid the valley heat and descend carefully on each blind bend.

In June the Santa Fe beech wood is a green, cool tunnel, over a thousand metres up, for the morning after the verbena. The Fonda del Montseny has a grill and is closed Monday and Tuesday: if the 24th falls on those days, check it is open.

At 950 metres, Prades is one of the few ranges near the Bages where in June you can still walk at midday. In summer the Fonda Espasa opens every day, and the Roca Foradada is half an hour from the village on an easy path.
Questions
Yes, 24 June is a holiday across Catalonia every year. The big celebration is the verbena on the night of the 23rd.
On the afternoon of 23 June, with a parade to the Plaça Major before the bonfire is lit. The Town Hall publishes the time each year.
It usually runs that day and the following ones. Confirm the calendar on the Turistren website and buy your ticket online.
Carcassonne: in France 24 June is an ordinary day.
Geocaliahttps://www.geocalia.com/en/spain/catalonia/manresa/getaways/sant-joan-long-weekend