1 / 2Mosaic Boulders
📍 Southside, CA
Mosaic Boulders is a compact bouldering-only gym in Telegraph Ave Berkeley. Membership includes free visits to partner gyms across Northern California. Shoe rentals available. Groups of up to 40 can book after-hours buyouts.
It is a smaller gym but still had a great time, doesn’t get too crowded, loved all the sets
🏆 Family Action Verdict
Best for school-age kids and teens who can follow basic safety rules in an open gym environment. The LED route system means beginners and advanced climbers can use the same wall simultaneously. First-timers get rental shoes and chalk bundled into the intro rate, making the first visit low-barrier.
ℹ️ What to Know Before You Go
💬 What Families Are Saying
View all reviews →64 Google reviews
Tim
“It is a smaller gym but still had a great time, doesn’t get too crowded, loved all the sets”
Alok Thakrar
“High quality sets, and good staff support and community. The gym, however, is a bit small and a tad bit dusty, and route grading is a little bit inconsistent. Overall a good time”
Reviews from Google
Overview
Mosaic Boulders occupies a smaller footprint on Telegraph Ave and delivers high-quality route sets across varied problems. Membership unlocks access to partner gyms including Bridges Rock Gym, Rocknasium, and Granite Arch. Shoe and chalk rentals are available on-site. Groups of 8–12 can walk in without reservations; larger groups can book exclusive after-hours gym buyouts for up to 40 guests. First-time visitors get rental gear included in a discounted entry rate.
