Palomar Observatory
Palomar Mountain · near Julian / Escondido · San Diego
Stargazing
At a glance
- Best season
- Spring–fall; check visitor center hours & tour/program schedules
What is here
- Highlights
- observatory · programs
- Landscape
- mountain
- Amenities
- Legendary 200-inch Hale Telescope · Visitor center & guided tours · Dark Palomar Mountain skies · Nearby Palomar Mountain SP camping
- Best for
- Seeing a legendary research telescope
- Features
- Historic 200-inch Hale Telescope · Visitor center & tours · Dark mountain setting · 20th-century astronomy landmark
Worth knowing
- Hazards
- Public night viewing is limited — mainly daytime visits & occasional events · Winding mountain road up Palomar — drive carefully · Cold mountain nights; occasional winter snow · Check current hours & tour availability before going
- Beginner friendly
- Yes
Stargazing detail
- Designation
- informal
- Reach
- easy
- Darkness
- 3
- Sky notes
- Home of the legendary 200-inch Hale Telescope — Caltech's historic Palomar Observatory sits atop a dark San Diego County mountain, with a visitor center and guided tours of one of the most important telescopes of the 20th century
- Stats note
- ~Bortle 3–4; Caltech's 200-inch Hale Telescope; visitor center & tours
- Campground
- Yes
- Intl tip
- Home of the legendary 200-inch Hale Telescope — Caltech's historic Palomar Observatory atop a dark San Diego County mountain (~Bortle 3–4), for decades the largest effective telescope in the world. Public access is mainly daytime, via a visitor center and guided tours beneath the great dome, with occasional special evening events; nearby Palomar Mountain State Park has camping and dark skies. More an astronomy pilgrimage than a hands-on observing site — public night viewing isn't generally available. Winding mountain road; cold nights, occasional snow. Check current hours and tours.
The guide
Palomar Observatory, atop Palomar Mountain in the dark backcountry of San Diego County, is one of the great landmarks of 20th-c…
In the Guidebook
Everything above is yours for free. The written guide to Palomar Observatory — what it is actually like, and what we would tell a friend before they went — comes with the Guidebook.
Getting there
- Coordinates
- 33.36, -116.86