Round 3 of the fourth Brussels Boulder Battle, held over a single evening during Petite Île's birthday event: 30 boulders of every level, scored out of 1,000 points in two categories. Taking part is free with entry to the hall; sign up on Etto Climbing.
As Petite Île announced it. Plans change, so check with the wall before you go. Something wrong? Let us know.
Free with entry
Round 9, the last round of the fourth Brussels Boulder Battle before the final: 30 new boulders of every level to try as often as you like during the round, scored out of 1,000 points in two categories. Taking part is free with entry to the hall; sign up on Etto Climbing.
€25
Klimzaal Blok, Antwerp, Belgium39 km away
Blok's big annual bouldering comp, with qualifying waves through the day for youth, amateur and pro climbers, a final from 20:30 with a DJ, and an afterparty. The hall is closed on 22 and 23 October while the problems are set.

€5 if you wear glitter
Beest Boulders Antwerpen, Antwerp, Belgium45 km away
An ABBA-themed evening of climbing and dancing under disco lights. Entry is €5 for anyone who turns up wearing glitter.

Klimzaal De Stordeur, Leuven, Flemish Brabant, Belgium28 km away
A stop on Blue Ice's harness demo tour, where climbers can try the Vista and Cuesta harnesses on the wall. The time hasn't been announced; the tour's stop at Klimax ran from 17:00.

Pink Peaks, Grimbergen, Flemish Brabant, Belgium9.6 km away
A Halloween night of UV climbing and lead climbing: come in fancy dress and get a free drink.
Evolution Verticale, Woluwe-Saint-Lambert, Brussels-Capital Region, Belgium7.6 km away
An evening session with the lights turned off: climbing in the dark by head torch, with fancy dress encouraged.

Free entry and a drink in costume
Face Nord, Mons, Hainaut, Belgium48 km away
A Halloween glow party at the climbing centre, open to everyone with no need to book. Come in costume for free entry and a free drink.
