Located in Capitol Planning Region, Connecticut, Peak Mountain is a mountain peak at about 177 m (581 ft) above sea level. The nearest town is Salmon Brook, about 4.8 km (3.0 mi) away (Peak Mountain lies ENE of town).
Peak Mountain, also called Copper Mountain, est. 730 feet (220 m), is a traprock mountain located in East Granby, Connecticut, 6 miles (10 km) south of the Massachusetts border and 6 miles west of the Connecticut River. It is part of the narrow, linear Metacomet Ridge that extends from Long Island Sound near New Haven, Connecticut, north through the Connecticut River Valley of Massachusetts to the Vermont border. Peak Mountain is known for its expansive views from 200 feet (61 m) high cliffs overlooking the historic Old Newgate Prison, Congamond Lake, and the Salmon Brook Valley of north-central Connecticut. The mountain is also known for its microclimate ecosystems, rare plant communities, and as a seasonal raptor migration path. It is traversed by the 51-mile (82 km) Metacomet Trail.From the Wikipedia article “Peak Mountain”, licensed under CC BY-SA 4.0.
Sunrise & sunset directions
At Peak Mountain the sunrise point swings a long way through the year: about 57° (ENE) at the June solstice and 122° (ESE) in late December. Sunset moves from 303° (WNW) in June to 239° (WSW) in December, and the midday sun climbs to 71° in summer but only 25° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 6:55 AM | 90° E | 7:03 PM | 271° W | 48° | 12h 08m |
| June solstice (Jun 21) | 5:16 AM | 57° ENE | 8:31 PM | 303° WNW | 71° | 15h 14m |
| September equinox (Sep 22) | 6:39 AM | 89° E | 6:50 PM | 271° W | 48° | 12h 11m |
| December solstice (Dec 21) | 7:16 AM | 122° ESE | 4:23 PM | 239° WSW | 25° | 9h 07m |
Azimuth is measured clockwise from true north (90° = east, 270° = west). Computed for 2026; values change by less than a degree from year to year.
Golden hour & blue hour by month
Summits catch first and last light — alpenglow can turn rock pink or orange minutes before sunrise and after sunset while valleys stay in shadow.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:46 AM | 7:17 AM | 8:00 AM | 4:01 PM | 4:45 PM | 5:16 PM | 9h 28m |
| February | 6:19 AM | 6:48 AM | 7:27 AM | 4:45 PM | 5:24 PM | 5:53 PM | 10h 36m |
| March | 6:36 AM | 7:04 AM | 7:41 AM | 6:21 PM | 6:58 PM | 7:25 PM | 11h 54m |
| April | 5:42 AM | 6:11 AM | 6:49 AM | 6:54 PM | 7:32 PM | 8:01 PM | 13h 21m |
| May | 5:00 AM | 5:32 AM | 6:12 AM | 7:25 PM | 8:05 PM | 8:37 PM | 14h 33m |
| June | 4:41 AM | 5:16 AM | 5:58 AM | 7:47 PM | 8:29 PM | 9:03 PM | 15h 13m |
| July | 4:56 AM | 5:29 AM | 6:11 AM | 7:44 PM | 8:26 PM | 8:59 PM | 14h 57m |
| August | 5:30 AM | 6:00 AM | 6:38 AM | 7:15 PM | 7:53 PM | 8:23 PM | 13h 53m |
| September | 6:04 AM | 6:32 AM | 7:09 AM | 6:26 PM | 7:02 PM | 7:30 PM | 12h 31m |
| October | 6:36 AM | 7:04 AM | 7:42 AM | 5:33 PM | 6:11 PM | 6:39 PM | 11h 07m |
| November | 6:12 AM | 6:42 AM | 7:23 AM | 3:50 PM | 4:31 PM | 5:01 PM | 9h 50m |
| December | 6:41 AM | 7:13 AM | 7:58 AM | 3:36 PM | 4:21 PM | 4:53 PM | 9h 08m |
Local time (America/New York), including daylight saving time. Golden hour runs from about −4° to +6° solar altitude, so the morning golden hour begins during blue hour, before sunrise.
Milky Way & night sky
From Peak Mountain, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.3 hours on a moonless night), and the core peaks around 19° above the southern horizon. Our light-pollution model puts the sky at about Bortle 5 (suburban sky), so expect visible sky glow; drive away from towns for better results.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -3° | — |
| February | Below 10° in darkness | — | 10° | — |
| March | 4:31 AM – 5:21 AM | 0.8 | 15° | SSE → SSE |
| April | 2:23 AM – 4:23 AM | 2.0 | 19° | SE → S |
| May | 12:32 AM – 3:32 AM | 3.0 | 19° | SSE → S |
| June | 10:41 PM – 3:01 AM | 4.3 | 19° | SSE → SSW |
| July | 10:31 PM – 1:41 AM | 3.2 | 19° | S → SW |
| August | 9:40 PM – 11:40 PM | 2.0 | 18° | S → SW |
| September | 8:38 PM – 9:38 PM | 1.0 | 15° | SSW → SW |
| October | Below 10° in darkness | — | 10° | — |
| November | Below 10° in darkness | — | -1° | — |
| December | Below 10° in darkness | — | -19° | — |
Window when the galactic core is at least 10° high during astronomical darkness on the 15th of each month. Pick nights within a few days of the new moon. Plan exact nights with the Milky Way planner.
Estimated sky darkness: 5 Bortle 5 — Suburban sky. The Milky Way is weak near the horizon and washed out overhead; long exposures pick up a sky glow. Modeled zenith brightness ≈ 19.61 mag/arcsec². Aurora needs roughly Kp 5.5+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show September as the clearest month (about 49% average cloud cover) and December as the cloudiest (64%). July is the warmest month and January the coldest, which matters for gear, snow access and how long batteries last at night.
Average cloud cover (%)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °F | 63 | 63 | 73 | 89 | 87 | 94 | 100 | 100 | 95 | 86 | 76 | 68 |
| Low °F | -10 | -12 | -1 | 21 | 33 | 40 | 51 | 51 | 41 | 23 | 10 | 4 |
| Precip. (in) | 3.0 | 3.5 | 3.9 | 4.2 | 3.5 | 4.3 | 3.6 | 3.6 | 3.9 | 4.5 | 3.6 | 4.3 |
Monthly climatology for the surrounding 1° grid cell from NASA POWER (MERRA-2). Mountain sites can be colder and cloudier than the cell average.
Photography tips for this mountain peak
- Clouds around the summit add drama — a clear blue sky is often the least interesting condition.
- Photograph the peak from a lake, meadow or ridge at sunrise when the face that looks east lights up first.
- Long lenses compress ridgelines; shoot the peak from several miles away to make it look massive.
- Afternoon thunderstorms are common in summer at high elevations — plan summit hikes for early morning.
- Snow on the summit holds detail best when you expose for the highlights and lift shadows later.
- Shoot RAW to keep the most latitude for high-contrast sunrise and sunset scenes.
Season: Early summer keeps snow on the peaks with green valleys below; autumn adds aspen or larch color in many ranges.
Suggested gear: Telephoto lens, Lightweight tripod, Warm layers, Microspikes in shoulder seasons. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Peak Mountain, closest first.
Mountain Peak
Mountain Peak
Mountain Peak
Covered Bridge
State Park
State Park
Mountain Peak
State Park
State ParkFAQ
When is the best time to photograph Peak Mountain?
What time is golden hour at Peak Mountain?
Where does the sun rise and set at Peak Mountain?
Can you see the Milky Way from Peak Mountain?
Do you need a permit to photograph at Peak Mountain?
How far is Peak Mountain from Salmon Brook?
Sources
Location data: Wikidata, USGS GNIS / GeoNames, Wikipedia. Sun, moon and Milky Way times are computed by LWPhoto Atlas for 2026. Climate: NASA POWER. Sky darkness is a population-based estimate (Walker's law), not a measurement. See data sources & licenses.