Bumpass Hell is a hot spring in Plumas County, California. It lies in or next to Lassen Volcanic National Park, so park hours, fees and rules apply. The nearest town is Chester, about 28 km (18 mi) away (Bumpass Hell lies NW of town).
Wikidata describes it as: “hot spring area”.
Sunrise & sunset directions
At Bumpass Hell the sunrise point swings a long way through the year: about 58° (ENE) at the June solstice and 121° (ESE) in late December. Sunset moves from 303° (WNW) in June to 239° (WSW) in December, and the midday sun climbs to 73° in summer but only 26° in winter.
| Date | Sunrise | Azimuth | Sunset | Azimuth | Noon sun | Daylight |
|---|---|---|---|---|---|---|
| March equinox (Mar 20) | 7:10 AM | 90° E | 7:18 PM | 271° W | 49° | 12h 08m |
| June solstice (Jun 21) | 5:37 AM | 58° ENE | 8:41 PM | 303° WNW | 73° | 15h 04m |
| September equinox (Sep 22) | 6:54 AM | 89° E | 7:05 PM | 271° W | 50° | 12h 10m |
| December solstice (Dec 21) | 7:27 AM | 121° ESE | 4:43 PM | 239° WSW | 26° | 9h 17m |
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
Steam is most visible on cold mornings; backlight from a low sun makes rising steam glow.
| Month (15th) | Blue hour starts | Sunrise | Golden hour ends | Golden hour starts | Sunset | Blue hour ends | Daylight |
|---|---|---|---|---|---|---|---|
| January | 6:58 AM | 7:28 AM | 8:10 AM | 4:22 PM | 5:04 PM | 5:34 PM | 9h 36m |
| February | 6:33 AM | 7:01 AM | 7:39 AM | 5:04 PM | 5:42 PM | 6:10 PM | 10h 41m |
| March | 6:51 AM | 7:18 AM | 7:54 AM | 6:37 PM | 7:13 PM | 7:40 PM | 11h 55m |
| April | 6:00 AM | 6:28 AM | 7:05 AM | 7:09 PM | 7:45 PM | 8:13 PM | 13h 17m |
| May | 5:19 AM | 5:50 AM | 6:29 AM | 7:37 PM | 8:16 PM | 8:47 PM | 14h 26m |
| June | 5:03 AM | 5:36 AM | 6:17 AM | 7:58 PM | 8:39 PM | 9:12 PM | 15h 03m |
| July | 5:17 AM | 5:49 AM | 6:29 AM | 7:56 PM | 8:36 PM | 9:08 PM | 14h 47m |
| August | 5:48 AM | 6:18 AM | 6:55 AM | 7:28 PM | 8:05 PM | 8:34 PM | 13h 47m |
| September | 6:20 AM | 6:48 AM | 7:24 AM | 6:41 PM | 7:17 PM | 7:44 PM | 12h 29m |
| October | 6:50 AM | 7:18 AM | 7:54 AM | 5:50 PM | 6:27 PM | 6:55 PM | 11h 10m |
| November | 6:24 AM | 6:53 AM | 7:34 AM | 4:09 PM | 4:50 PM | 5:19 PM | 9h 57m |
| December | 6:52 AM | 7:23 AM | 8:06 AM | 3:58 PM | 4:41 PM | 5:12 PM | 9h 18m |
Local time (America/Los Angeles), 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 Bumpass Hell, the Milky Way core is visible in a dark sky from March through September. June gives the longest window (about 4.7 hours on a moonless night), and the core peaks around 21° above the southern horizon. Our light-pollution model puts the sky at about Bortle 2 (typical truly dark site), which is excellent for astrophotography.
| Month | Core visible (15th) | Hours | Max altitude | Direction |
|---|---|---|---|---|
| January | Below 10° in darkness | — | -2° | — |
| February | 5:23 AM – 5:23 AM | 0.0 | 11° | SE → SE |
| March | 4:34 AM – 5:44 AM | 1.2 | 17° | SE → SSE |
| April | 2:33 AM – 4:43 AM | 2.2 | 20° | SE → S |
| May | 12:28 AM – 3:48 AM | 3.3 | 21° | SE → S |
| June | 10:44 PM – 3:24 AM | 4.7 | 21° | SSE → SSW |
| July | 10:35 PM – 2:05 AM | 3.5 | 21° | S → SW |
| August | 9:48 PM – 11:58 PM | 2.2 | 20° | S → SW |
| September | 8:49 PM – 9:59 PM | 1.2 | 17° | SSW → SW |
| October | 7:58 PM – 7:58 PM | 0.0 | 11° | SW → SW |
| 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: 2 Bortle 2 — Typical truly dark site. The summer Milky Way shows rich structure; clouds look like black holes in the stars. Modeled zenith brightness ≈ 21.81 mag/arcsec². Aurora needs roughly Kp 8.0+ to show low on the northern horizon here.
Weather & best season
Long-term NASA satellite data for this area show July as the clearest month (about 14% average cloud cover) and December as the cloudiest (62%). July is the warmest month and December 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 | 64 | 65 | 74 | 88 | 94 | 102 | 99 | 96 | 87 | 74 | 58 |
| Low °F | -1 | 2 | 5 | 10 | 23 | 27 | 38 | 35 | 26 | 21 | -2 | -3 |
| Precip. (in) | 5.0 | 5.9 | 5.3 | 3.1 | 2.0 | 0.7 | 0.1 | 0.1 | 0.5 | 2.0 | 3.8 | 7.1 |
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 hot spring
- A polarizer brings out the colors of mineral terraces and microbial mats.
- Respect bathers' privacy: ask before including people at soaking pools.
- Wind direction determines where steam drifts; shoot from the upwind side to see the pool.
- Condensation forms quickly on lenses; let gear acclimate and carry a cloth.
- Tell someone where you're going in remote areas and carry the ten essentials.
Season: Winter gives the most dramatic steam; some primitive springs are only accessible in summer.
Suggested gear: Circular polarizer, Lens cloth, Telephoto for distant pools. Work out exposures with the depth of field, ND filter and NPF rule calculators.
Permits, drones & access
National Park Service rules. Under federal law (54 U.S.C. 100905), still photography in National Park Service areas needs a permit only when it (1) takes place where members of the public are not allowed, (2) uses models, sets or props that are not part of the location's natural or cultural resources or administrative facilities, or (3) would cause the park to incur additional administrative costs to monitor the activity. Ordinary visitor and most landscape photography needs no permit. Commercial filming rules are separate and have changed in recent years — confirm current requirements with the park before a paid shoot.
Drones: Launching, landing or operating unmanned aircraft (drones) is prohibited in National Park Service units under a 2014 Superintendent's closure (36 CFR 1.5), except where a park has issued specific written approval. Flying from outside the boundary over park land can also violate park rules and disturb wildlife.
Nearby photo spots
Other locations within 25 km of Bumpass Hell, closest first.
Hot Spring
Mountain Peak
Scenic Viewpoint
Lake
Waterfall
Hot Spring
Mountain Peak
VolcanoWaterfallCampgrounds nearby (Recreation.gov)
- Southwest Campground - Winter/Spring3.4 km (2.1 mi)
- Summit Lake South7.7 km (4.8 mi) · reservable
- Summit Lake North7.8 km (4.8 mi) · reservable
- Summit Lake Stock Corral8.3 km (5.2 mi) · reservable
- Warner Valley Campground9.2 km (5.7 mi) · reservable
FAQ
When is the best time to photograph Bumpass Hell?
What time is golden hour at Bumpass Hell?
Where does the sun rise and set at Bumpass Hell?
Can you see the Milky Way from Bumpass Hell?
Do you need a permit to photograph at Bumpass Hell?
How far is Bumpass Hell from Chester?
Sources
Location data: Wikidata. 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.