Radium Boulders

NEW BAGELS on the menu! Soo tasty, come try them!
🧀Aged cheese+egg🥚 or
🐔crunchy vegan chicken with sriracha (vegan) mayo🌶

The World Climbing Series are underway, next stop Innsbruck! Traditionally, the best climbers all turn up in Innsbruck, so let's see who is gonna take the title! Come watch on the big screen at Radium. Who do you think is gonna win?

Open Stage | Thursday 2 July

This month's theme: SAUNA! Embrace the heat, feeling hot hot hot!

👨‍🎤If you want to perform a specific song, you can already let the houseband know via our website so they can prepare.
🪇As always free entry to the bar, each Open Stage is a party and you can still join on stage on the night!

The houseband: and

NEW Grip & Go FREE physio consultations | Uneven weeks on Wednesdays

physical therapy will be available for FREE consultations every other week on Wednesdays, starting from Wednesday 17 June!

Fabienne and Mark offer a wide range: from injury prevention to rehabilitation to strength and technique training, mental support and sport-specific load-bearing capacity. They followed an extra training for climbing specific injuries and are themselves climbers, so you're in great hands!

Sign up for the consultation at Radium via the Grip & Go website (link in our bio).

Sing when you’re winning! Book a private karaoke room with your friends

Conveniently located in the Boschstraat, airconditioned and perfectly suited for you to sing your heart out! Partners of Boulderbaas Festival 2026🫶

The World Climbing Series are underway, next stops Prague and Innsbruck! Come watch the best climbers in the world compete for the titles on the big screen at Radium. Who will you be cheering for?

Open Stage | Thursday 4 June

This month's theme: Slayground!

👨‍🎤If you want to perform a specific song, you can already let the houseband know via our website so they can prepare.
🪇As always free entry to the bar, each Open Stage is a party and you can still join on stage on the night!

The houseband: and

TOMORROW: BOULDERBAAS FESTIVAL 30-31 May 2026
Come celebrate everything that makes bouldering awesome - FOR JUST €6!!!* Comp with 30 boulders and final, workshops, clinics, music and creative activities covering bouldering from various angles. Check out the full programme on our website.

THE COMPETITION
30 qualifiers in ascending levels with both zone and top. You will have all day Saturday and most of the day Sunday to climb them all, so take your time, enjoy the other activities, no rush!

THE FINALS
Sunday afternoon, scramble format, with 3 boulders for men and women.

CAMPING RADIUM
In a tent ⛺️ or just in a sleeping bag on the mats, you can spend the night at Radium and wake up to a nice breakfast for a fresh start to your second festival day. Camping includes entry to Radium on Sunday 31 May! Places limited, don't wait to book.

*Stichting Boulderbaas is not for profit. Together with our partners and we aim to make bouldering as accessible as possible. Cost of entry to Radium is not included, get day passes or check in with membership/10-times card from Radium or sister gyms or .

KARAOKE Saturday 30 May 20:30 OPEN TO ALL
On Saturday night during Boulderbaas Festival we're doing karaoke!

BOULDERBAAS FESTIVAL 30-31 May 2026
Come celebrate everything that makes bouldering awesome - FOR JUST €6!!!* Comp with 30 boulders and final, workshops, clinics, music and creative activities covering bouldering from various angles. Check out the full programme on our website.

*Stichting Boulderbaas is not for profit. Together with our partners and we aim to make bouldering as accessible as possible. Cost of entry to Radium is not included, get day passes or check in with membership/10-times card from Radium or our sister gyms.

FRONTENPARK CLEANUP
Make the park clean again! Radium Boulders is situated between the Hoge and Lage Fronten, a beautiful park with lots of interesting walls and animals. Did you know this is the only place in the Netherlands where you can find the Podarcis Muralis? Let's make an effort to make it even better and clear all the trash. We'll provide garbage bags and some gloves, but please bring your own gloves if you have them. Free coffee + treat for all that join!

BOULDERBAAS FESTIVAL 30-31 May 2026
Come celebrate everything that makes bouldering awesome - FOR JUST €6!!!* Comp with 30 boulders and final, workshops, clinics, music and creative activities covering bouldering from various angles. Check out the full programme on our website.

*Stichting Boulderbaas is not for profit. Together with our partners and we aim to make bouldering as accessible as possible. Cost of entry to Radium is not included, get day passes or check in with membership/10-times card from Radium or our sister gyms.