Free WiFi at CU Boulder Norlin Library
Connect to the 'CU Guest' network for visitor access (email registration required). CU students and staff use 'CU Secure'.
CU Boulder's Norlin Library is the main library on campus and offers free WiFi to visitors via the CU Guest network. Spacious study areas, power outlets, and quiet floors available. Visitors register once by email to get a guest login (valid 7 days, up to 3 devices); CU students and staff use CU Secure with IdentiKey credentials.
Located on the main CU campus; parking available nearby on Pleasant Street.
Verified Speed on CU Guest
We connected to the CU Guest network on campus and ran two Ookla speed tests on 2026-06-03 — both from the Marine Street Science Center, one at the edge of coverage and one directly under a wireless access point. Same network, same building; the only variable was distance to the access point:

Under the access point: 86.74 Mbps down / 93.22 up, 6 ms ping — plenty for video calls and large downloads.

At the edge of coverage: 35.17 Mbps down / 27.40 up, 5 ms ping — still carried Teams video calls over VPN reliably all week. The lesson for any CU building, Norlin included: sit near a visible access point or in a common area for the best throughput. Ping stays low either way.