Boulder is around the same size as Glendale.

Glendale is approximately 79 sq km, while Boulder is approximately 70 sq km, making Boulder 88.19% the size of Glendale.
Tip: This to-scale comparison of Glendale vs. Boulder uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.