First IDA-certified state park in Oregon — high-desert reservoir DSP.
Updated:
· Tonight: Friday, August 14, 2026
📍 Central OR🌑 Bortle 2🚗 About 25 miles southeast of Prineville, Oregon, and roughly an hour from Bend.
About Prineville Reservoir
Prineville Reservoir State Park runs its own small observatory in the main day-use area and is a certified International Dark Sky Park in central Oregon's high desert. It's an easy, family-friendly stop for stargazing without heading deep into the backcountry.
What you can see in the sky
Milky Way over the reservoir, planets and the moon through the park's telescopes during ranger programs.
Best time of year
Summer weekends, when the park runs scheduled stargazing and constellation-tour events — check the Oregon State Parks events calendar for dates.
Why this site is worth the drive
Certified International Dark Sky Park with an on-site observatory
Scheduled ranger-led stargazing and lunar-viewing events in summer
Reservoir setting adds reflections and an open western horizon
Practical tips for Prineville Reservoir
A stargazing permit is required for after-hours use of the day-use area — available from the park office
Standard Oregon day-use parking fee applies
Check the Oregon State Parks events calendar for scheduled ranger programs
Live 48-hour forecast
Tonight's verdict above is a build-time snapshot. For the full
hourly view — cloud cover, transparency, seeing, smoke, humidity,
moon altitude and a Bortle-aware tonight score by observing mode
(visual, deep-sky, planetary, astrophoto) — open the live forecast:
The live page combines Open-Meteo weather, US-AQI wildfire smoke,
moon math and Bortle-scale darkness into a single tonight score
(0–100), updated continuously.
Frequently asked questions
Is Prineville Reservoir good for stargazing tonight?
Tonight's verdict is Poor (Medium confidence). No sustained clear window; brief gaps possible (min cloud 1%).
When is the best time of year to stargaze at Prineville Reservoir?
Summer weekends, when the park runs scheduled stargazing and constellation-tour events — check the Oregon State Parks events calendar for dates.
How long is the drive from Toronto?
About 25 miles southeast of Prineville, Oregon, and roughly an hour from Bend.
What can I see in the sky here?
Milky Way over the reservoir, planets and the moon through the park's telescopes during ranger programs.
How dark is the sky? (Bortle scale)
Prineville Reservoir sits at Bortle class 2 on the 1–9 dark-sky scale, where 1 is a pristine wilderness sky and 9 is an inner-city sky.