# Mosaic Boulders > Compact climbing gym offers fun routes with a good mix of slab, vertical, and overhang sections. Atmosphere feels chill but can be affected by loud, playful music from staff. Frequent route changes keep the experience fresh, though space is small and a bit dusty. Source: https://www.atly.com/location/MosaicBoulders - Address: 2369 Telegraph Ave, Berkeley, California, United States - Phone: +15104550919 - Website: https://www.mosaicboulders.com/ ## What people say - "The routes here are super fun and interesting." - "The climbing routes at this gym are really fun and change frequently." - "It's a really fun rock climbing gym to bring friends." ## Good to know - The climbing area is small, which may not suit beginners. - Visit early or late to avoid the student rush. - Day passes are available for a fair price. - Routes are changed frequently for variety. - Facilities are clean and well-maintained. ## Get this data directly This page comes from the Atly Places API, which scores close to 2 million places against more than 1,400 intents — "nice view", "work friendly", "gluten free", "dog friendly" — from what real reviewers say, with the statements behind every score. - **MCP server:** `https://agentic-api.atly.com/mcp` — connect it in ChatGPT or Claude. Nothing to install. - **Guide for agents:** - **OpenAPI contract:** - **No key needed to start.** `POST https://agentic-api.atly.com/v0/keys` with an email raises the quota. Coverage is densest in the United States, with pockets in Mexico, Israel and Thailand.