Located in Grafton County, New Hampshire, Mill Brook Cascade is a waterfall at about 311 m (1,020 ft) above sea level. The nearest town is Thornton, about 5.1 km (3.2 mi) away (Mill Brook Cascade lies NE of town).
Sunrise & sunset directions
At Mill Brook Cascade the sunrise point swings a long way through the year: about 56° (NE) at the June solstice and 123° (ESE) in late December. Sunset moves from 305° (NW) in June to 238° (WSW) in December, and the midday sun climbs to 70° in summer but only 23° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 6:51 AM | 90° E | 6:59 PM | 271° W | 46° | 12h 08m |
| June solstice (Jun 21) | 5:05 AM | 56° NE | 8:33 PM | 305° NW | 70° | 15h 29m |
| September equinox (Sep 22) | 6:34 AM | 89° E | 6:46 PM | 271° W | 46° | 12h 12m |
| December solstice (Dec 21) | 7:19 AM | 123° ESE | 4:12 PM | 238° WSW | 23° | 8h 54m |
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
Waterfalls photograph best in soft, even light: overcast days, deep shade, or the hour after sunrise before direct sun hits the water. Bright sun on white water blows highlights and adds harsh contrast.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:46 AM | 7:19 AM | 8:04 AM | 3:49 PM | 4:35 PM | 5:07 PM | 9h 16m |
| February | 6:17 AM | 6:47 AM | 7:27 AM | 4:36 PM | 5:16 PM | 5:46 PM | 10h 30m |
| March | 6:31 AM | 7:00 AM | 7:38 AM | 6:15 PM | 6:53 PM | 7:21 PM | 11h 53m |
| April | 5:34 AM | 6:04 AM | 6:43 AM | 6:51 PM | 7:30 PM | 8:00 PM | 13h 26m |
| May | 4:48 AM | 5:22 AM | 6:03 AM | 7:24 PM | 8:06 PM | 8:39 PM | 14h 44m |
| June | 4:28 AM | 5:04 AM | 5:48 AM | 7:47 PM | 8:31 PM | 9:08 PM | 15h 27m |
| July | 4:44 AM | 5:18 AM | 6:01 AM | 7:45 PM | 8:28 PM | 9:03 PM | 15h 09m |
| August | 5:20 AM | 5:51 AM | 6:31 AM | 7:13 PM | 7:53 PM | 8:24 PM | 14h 01m |
| September | 5:57 AM | 6:26 AM | 7:04 AM | 6:21 PM | 6:59 PM | 7:28 PM | 12h 33m |
| October | 6:32 AM | 7:01 AM | 7:41 AM | 5:25 PM | 6:04 PM | 6:33 PM | 11h 03m |
| November | 6:11 AM | 6:42 AM | 7:25 AM | 3:39 PM | 4:22 PM | 4:53 PM | 9h 40m |
| December | 6:42 AM | 7:15 AM | 8:02 AM | 3:23 PM | 4:10 PM | 4:43 PM | 8h 55m |
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 Mill Brook Cascade, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 3.7 hours on a moonless night), and the core peaks around 17° above the southern horizon. Our light-pollution model puts the sky at about Bortle 3 (rural sky), good enough for detailed Milky Way images.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -5° | — |
| February | Below 10° in darkness | — | 8° | — |
| March | 4:40 AM – 5:20 AM | 0.7 | 14° | SSE → SSE |
| April | 2:36 AM – 4:16 AM | 1.7 | 16° | SSE → S |
| May | 12:41 AM – 3:11 AM | 2.5 | 17° | SSE → S |
| June | 10:57 PM – 2:37 AM | 3.7 | 17° | SSE → SSW |
| July | 10:43 PM – 1:13 AM | 2.5 | 17° | S → SSW |
| August | 9:45 PM – 11:15 PM | 1.5 | 16° | S → SSW |
| September | 8:38 PM – 9:08 PM | 0.5 | 13° | SSW → SSW |
| October | Below 10° in darkness | — | 8° | — |
| November | Below 10° in darkness | — | -2° | — |
| 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: 3 Bortle 3 — Rural sky. Some light domes sit on the horizon, but the Milky Way still looks complex overhead. Modeled zenith brightness ≈ 21.54 mag/arcsec². Aurora needs roughly Kp 4.5+ 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 51% average cloud cover) and December as the cloudiest (68%). 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 | 59 | 65 | 74 | 82 | 84 | 94 | 105 | 94 | 93 | 79 | 70 | 62 |
| Low °F | -23 | -23 | -19 | 13 | 28 | 37 | 49 | 44 | 35 | 20 | -3 | -17 |
| Precip. (in) | 2.8 | 3.5 | 3.5 | 4.1 | 3.8 | 4.8 | 4.1 | 3.8 | 3.7 | 5.0 | 3.9 | 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 waterfall
- Use 1/4 to 1 second for a silky look; 1/500 s or faster freezes individual drops.
- A circular polarizer cuts glare on wet rocks and leaves and deepens greens — rotate it while watching the rocks, not the sky.
- Spring snowmelt and the days after heavy rain give the strongest flow; late summer flow can drop to a trickle.
- Look for a foreground: a mossy boulder, a fallen log or the creek's leading lines make a stronger frame than the falls alone.
- Shoot RAW to keep the most latitude for high-contrast sunrise and sunset scenes.
Season: Peak flow is usually in late spring; autumn adds color around the falls, and winter can bring ice formations at colder locations.
Suggested gear: Tripod, Circular polarizer, 3–6 stop ND filter, Lens cloth, Waterproof footwear. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Nearby photo spots
Other locations within 25 km of Mill Brook Cascade, closest first.
Waterfall
Mountain PeakWaterfallWaterfall
Mountain PeakWaterfall
Covered Bridge
Scenic ViewpointWaterfallCampgrounds nearby (Recreation.gov)
- Campton Campground5.5 km (3.4 mi) · reservable
- Waterville Campground9.7 km (6.0 mi) · reservable
- Russell Pond Campground9.7 km (6.1 mi) · reservable
- Osceola Vista Campground10.3 km (6.4 mi) · reservable
- Big Rock15.0 km (9.3 mi) · reservable
FAQ
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Sources
Location data: USGS GNIS / GeoNames. 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.