San Ramon, CA: how dark is the sky here?

San Ramon's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. Only 11.5% of the 3,206 cities measured here read darker than San Ramon.

This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.

The nearest darker sky to San Ramon

Truckee, CA, about 144 miles away as the crow flies, measures in the dark sky band, one step darker than San Ramon. Actual driving distance will run longer than that straight-line figure.

Truckee, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

How San Ramon compares nationally

San Ramon, CA has a population of about 85,924, one of 3,206 US cities of 10,000 or more residents in this dataset. San Ramon places 367 of 3,206 cities in this dataset's darkest-to-brightest order.