Ketchum, Idaho
Dark · Milky Way overhead, hazy lower down
3 stays nearby →Craters Of The Moon National Monument, a Dark Sky Park
- How dark?
- Exceptional darkness · Milky Way obvious
- Entry
- $20 per vehicle, 7 days
- Food & town
- Arco · about 20 mi
- Certified
- Dark Sky Park · 2017
How dark is it, really?
Dark enough that the Milky Way is obvious the moment you look up, with no town glow worth mentioning on any horizon. (For the detail-minded: Bortle class 1–2, an estimate.)
When should I go?
Pick a night when the moon is down. The next stretch of moonless evenings is Nov 5–12.
| Best nights | Moonlight | Worth staying up for |
|---|---|---|
| Nov 5–12 | Thin crescent, rises late | A sky full of stars, and extra shooting stars (Leonids) |
| Dec 5–11 | None · darkest skies | A sky full of stars, and extra shooting stars (Geminids) |
| Jan 3–9 | None · darkest skies | A sky full of stars, and a meteor shower peak (Quadrantids) |
More dark windows, through Oct 2027
| Best nights | Moonlight | Worth staying up for |
|---|---|---|
| Feb 1–8 | Thin crescent, sets early | A sky full of stars |
| Mar 2–9 | Thin crescent, rises late | The Milky Way core |
| Mar 31–Apr 7 | Crescent, rises late | The Milky Way core |
| Apr 30–May 7 | Crescent, rises late | The Milky Way core, and a meteor shower peak (Eta Aquariids) |
| May 31–Jun 6 | Thin crescent, rises late | The Milky Way core |
| Jul 1–8 | Crescent, sets early | The Milky Way core |
| Jul 30–Aug 7 | Mostly none · crescent on the edge nights | The Milky Way core, and a meteor shower peak (Southern Delta Aquariids) |
| Aug 29–Sep 5 | Crescent, sets early | The Milky Way core |
| Sep 27–Oct 4 | Crescent, sets early | A sky full of stars |
Computed from public astronomical data for this location. Updated monthly. How it's computed
Milky Way season here: Early Mar to late Sep. Out of season until early Mar. In season now, through late Sep. Out of season until early Mar.
Meteor showers ahead: Leonids on Nov 17–18 (half moon, sets around midnight), Geminids on Dec 13–14 (thin crescent, sets early), Ursids on Dec 22–23 (full moon, up all night), and Quadrantids on Jan 3–4 (none · darkest skies)Lyrids on Apr 22–23 (bright moon for most of the night)Eta Aquariids on May 5–6 (none · darkest skies)Southern Delta Aquariids on Jul 30–31 (thin crescent, rises late)Perseids on Aug 12–13 (bright moon for most of the night).
Email me before the next dark window at Craters Of The Moon National Monument.
About one email a month, a few days before the moon goes dark: the dates here, the moonlight, and what's worth staying up for. Unsubscribe in one click.
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Food, fuel, and supplies
Arco, ID is about 20 mi away in a straight line, with groceries (A & A Market), 5 gas stations, and 5 places to eat on the map. Nearest places to eat on the map: Tres hermanos (about 20 mi), Deli Sandwich Shop (about 20 mi), and Number Hill Grill (about 20 mi).
Distances are straight-line and approximate. Places on the map may not be open. Map data © OpenStreetMap contributors, ODbL.
✓ Certification verified Jul 2026 against DarkSky International registry (Internet Archive capture) · entry fee from National Park Service (Sep 2026) · darkness: Bortle 1–2, estimated (Sep 2026) · nearest town from OpenStreetMap contributors (ODbL) (Sep 2026)
Dark sky places near Craters Of The Moon National Monument
For a trip with more than one dark night: the closest within 150 miles, nearest first. Distances are straight-line, not driving.
Dark Sky Community Dark Sky Reserve Central Idaho
Exceptional darkness · Milky Way obvious
3 stays nearby →Dark Sky Park City of Rocks National Reserve
Very dark · Milky Way across the sky on clear nights
1 stay nearby →Dark Sky Park Bruneau Dunes State Park
Dark · Milky Way overhead, hazy lower down
2 stays nearby →