Hiking

Hiking in Shorter Days: Sunset Planning and How to Choose a Headlamp for Hiking

By Caleb · 2026-10-29

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To be transparent: I use AI to help gather comparison data and research for MOE articles. The experiences and opinions are my own.

When the clocks fall back, it feels like someone took an hour of hiking right out of the afternoon. The trails are still great this time of year, but the window of daylight gets small, and it closes faster than a lot of new hikers expect.

I've been lucky to have access to the outdoors my whole life, and short days are just part of the year where I hike. This guide covers the simple habits that keep a short-day hike fun instead of stressful: checking sunset, setting a turnaround time, starting earlier, and carrying a headlamp for hiking (and knowing how to use it kindly).

The short answer: Look up the sunset time for where you're hiking. Set a turnaround time so you don't get stuck in the dark, and stick to it. Carry a headlamp and extra batteries on every hike, even a short one. Leave a trip plan with someone at home. And when you use your light, keep it low and out of other people's eyes, and give wildlife their dark.

Check the sunset time (and know how fast light fades)

Look up sunset for the trailhead

Sunset depends on where you are, so look it up for the trail itself. The NOAA Global Monitoring Laboratory has a free Solar Calculator that finds sunrise and sunset for any place on Earth.

What happens after sunset: twilight

Light doesn't switch off at sunset. It fades through stages called twilight. The National Weather Service explains that evening civil twilight starts at sunset and ends when the center of the sun is 6 degrees below the horizon. During civil twilight, with no fog or other restrictions, you can still make out the horizon and objects on the ground, and in many cases you don't need artificial light. After that comes nautical twilight (down to 12 degrees), then astronomical twilight, and it keeps getting darker (National Weather Service: Twilight Types).

Notice the fine print there: "absent fog or other restrictions" and "in many cases." Twilight is a little bonus light, not something to plan your hike around. NPS also points out that darkness makes any activity more challenging, so take your time and watch your step (NPS: Find Your Park After Dark).

Set a turnaround time

A turnaround time is the clock time when you head back, no matter where you are on the trail. The National Park Service advises hikers to be aware of the time they set out and turn around so they don't get stuck outside in the dark, to set a turnaround time if a trip is taking longer than planned, and to stick to it (NPS: Hiking Safety).

To pick one, start with sunset and work backward by the time it'll take you to hike out. Don't assume the return is as fast as the way in. NPS says that if any part of your hike is uphill, you should plan for it to take at least double the time it took to go downhill (NPS). If you hit your turnaround before the summit or the waterfall, turn around anyway. The trail will be there next weekend.

My own turnaround habit is pretty simple. I check in on my energy level and the weather, and I think about how much time and travel it'll take to get back to the trailhead. If any of those tell me it's time, I turn around.

Start earlier

The simplest way to get more daylight on a short day is to start earlier and pick a hike that fits. NPS suggests choosing a trail that everyone in your group can complete and enjoy safely, and asking a ranger or checking the park's website for difficulty details (NPS: Hiking Safety). The MOE trail map can help you find something close by. Before you go, run through my day hike checklist (here's the original beginner day hike checklist too).

One exception: in hunting season, earlier isn't always better. A state wildlife agency notes that wildlife, and so hunters, are most active at dawn and dusk, and that midday hikes are best in the fall (state wildlife agency). My guide to hiking during hunting season goes into more detail.

Headlamp basics: how to choose a headlamp for hiking

The National Park Service lists illumination as one of the Ten Essentials. It says headlamps are the recommended light source because they're hands-free, and to pack extra batteries (NPS: The 10 Essentials). Your phone isn't a substitute. NPS says a cell phone is not an appropriate light source, because using it as a flashlight can drain the battery quickly, and you want it charged for emergencies (NPS: Find Your Park After Dark).

I don't have one go-to headlamp. Honestly, the best one I've had was a cheap Energizer headlamp I picked up one time when I'd forgotten to bring one of the headlamps I own. I also have a newer rechargeable Nebo headlamp that I got as a Christmas gift.

Lumens: what the numbers mean

Lumens measure a light's total light output (Streamlight: ANSI/PLATO FL1 information). Many makers test their lights to the ANSI/PLATO FL1 standard, which also covers beam distance, run time, impact resistance, and water resistance. Following the standard is voluntary, but it gives you a common way to compare lights (Streamlight). For example, Petzl explains that it measures lumens with new batteries shortly after the lamp is turned on, and that burn time is how long the light takes to drop to 10% of its starting output (Petzl: How lighting performance is measured with ANSI/PLATO FL1).

The big takeaway: brightness and run time trade off. Petzl puts it plainly: for a given amount of energy, increasing brightness automatically decreases burn time, and vice versa (Petzl: Brightness and Burn Time). So when you compare headlamps, look at the run time listed for each brightness setting, not just the highest lumen number on the box.

Beam modes: flood vs. spot

Petzl describes three basic beam patterns (Petzl: Beam pattern):

Wide (flood) beam: Uniform, close-range light for stationary activities or slower movement, like reading a map or setting up camp.
Focused (spot) beam: Concentrates light to shine long distances for precise, long-range vision.
Mixed beam: Combines both, with wide light on the ground plus a focused beam for depth. Petzl lists hiking as an activity this pattern suits.

Petzl also notes that a flood beam isn't suited to seeing far, and a focused beam won't work well for close-up tasks like reading a map (Petzl). Each lamp works a little differently, so read the instructions that come with yours (Petzl: Tips for protecting your headlamp (PDF)).

Red light

Many headlamps have a red light mode, and it's worth having. NPS explains that white light from flashlights and phones can harm your night vision, while red light won't affect yours (or other people's) as much. It also takes 20 to 30 minutes for your eyes to fully adjust to very low light (NPS: Stargazing 101). Even red light can reduce night vision if it's bright, so a dim red light is best (NPS: Dark Adaptation and Red Flashlights). Leave No Trace suggests using the red setting to preserve night vision (LNT: Headlamp Etiquette 101).

Battery types: AAA alkaline, lithium, or rechargeable

AAA alkaline: The standard disposable battery. Energizer's alkaline handbook lists a recommended operating range down to -18°C, and notes that cold still reduces performance within that range (Energizer: Alkaline Handbook (PDF)).
AAA lithium (disposable): Energizer says its lithium AA and AAA batteries are considerably lighter than other battery types and handle low temperatures better (Energizer: Lithium Handbook (PDF)).
Rechargeable: Some headlamps use a built-in or proprietary rechargeable pack. Some "hybrid" models take either a rechargeable pack or AAAs. For example, Petzl lists one of its hybrid lamps as compatible with AAA batteries (rechargeable or not; alkaline, lithium, or Ni-MH) as well as its own rechargeable pack (Petzl: NAO LT technical notice (PDF)). Energizer reminds you that rechargeable batteries lose some charge each day off the charger, so charge them a few hours before you head out (Energizer: Battery Care).

Whatever you pick, use only the battery size and type your headlamp's instructions specify. That includes lithium: only use it if the maker says it's okay for that lamp. Energizer and Duracell both say this, and both warn against mixing old and new batteries or different types in the same device (Energizer: Battery Care; Duracell: Battery FAQs). Petzl also says to follow each lamp's battery compatibility recommendations (Petzl).

Carry spares, and use the lock

NPS says to pack extra batteries (NPS), and for nighttime outings it recommends having more than one light: "Always have a light source, or better yet, two or three!" (NPS: Find Your Park After Dark). Don't toss loose spares in a pocket with keys or coins. Energizer and Duracell warn that metal objects can short-circuit batteries and cause heat or leaking (Energizer; Duracell).

A headlamp that switches on by accident in your pack can be dead by the time you need it. Petzl recommends locking your lamp after use to avoid accidental switching on, and notes that the locking method is different for each lamp (Petzl: Tips for protecting your headlamp (PDF)). For carrying a lamp you're not using, Petzl also recommends disconnecting the batteries so it can't turn on by accident (Petzl: NAO LT technical notice (PDF)).

For my own spares, I carry two AA batteries. As an emergency backup, I always have my cell phone, and it can work as a light in a pinch. That's a backup only, though. Like NPS says, a phone isn't a substitute for a real light.

Cold weather and battery life

Short days usually come with cold ones, and cold is hard on batteries:

Alkaline: Energizer explains that as the temperature drops, the chemistry inside the battery slows down, so it won't reach maximum performance in the cold. Batteries discharge more efficiently as they warm up (Energizer: Alkaline Handbook (PDF)).
Lithium: Energizer says its lithium AA and AAA batteries are designed to work from as low as -40°C up to +60°C (Energizer: Lithium Handbook (PDF)).
Rechargeable lithium-ion: Petzl says temperatures below 0°C reduce the lamp's battery life, because faster discharge dims the light. That's temporary: once the battery warms up again, it gets its capacity back. Petzl also says to recharge lithium-ion batteries only between 0°C and +40°C (Petzl: Tips for protecting your headlamp (PDF)).

What that means on the trail:

Expect shorter run times in the cold, based on the Energizer and Petzl information above.
Keep your light and spares warm. Batteries work better warm, and Petzl notes that lithium-ion batteries recover once they warm up (Energizer; Petzl). An inside pocket is one way to do that, as long as it's away from keys and coins (Energizer).
Use the lowest setting that works. Lower brightness means longer burn time (Petzl).
Charge indoors before you leave, within the temperature range the maker gives (Petzl; Energizer).

Your body needs warmth too. See my guide to layering for cold weather.

Tell someone your plan

Before any hike, and especially on short days, let someone know where you're going. NPS recommends leaving a trip plan that covers where you'll be hiking, your contact information, when you plan to arrive and return, and who's coming with you. Leave it with a trusted friend or family member who isn't going on the trip. Those details can be very helpful to search and rescue if something goes wrong (NPS: Hiking Safety).

Here's what I do: I tell my wife. I send her a screenshot of the map, plus the contact info for the local ranger station or Department of Natural Resources, whichever covers that area.

Leave No Trace on short days

Hiking near dusk is a great reason to brush up on the Leave No Trace 7 Principles. Here's how they fit short-day hiking:

Plan ahead and prepare. Checking sunset, setting a turnaround time, and packing a headlamp are all part of planning ahead (LNT).
Travel on durable surfaces. LNT says to stay within the trail's width and not shortcut switchbacks (LNT: Travel on Durable Surfaces). NPS adds to stay on trails and take your time in the dark (NPS).
Respect wildlife. LNT says to watch wildlife from a distance and not follow or approach them. It also points out that in winter, animals work extra hard to survive, and making them flee uses energy they need (LNT: Respect Wildlife). Many animals depend on darkness, and NPS notes that artificial light can interfere with the vision, foraging, and movement of many mammals (NPS: Animals Need the Dark). LNT suggests carrying your headlamp around your neck or in your hand to avoid accidentally spotlighting other visitors or animals (LNT: Headlamp Etiquette 101).
Be considerate of other visitors. LNT's headlamp etiquette tips say to turn your headlamp off around camp and use ambient light, use the red setting, keep the lamp low so you don't spotlight people, and remind each other when a light is too bright or not needed (LNT: Headlamp Etiquette 101). Its Be Considerate principle also lists excessive noise as something that spoils other people's time outdoors (LNT: Be Considerate of Others).
Dispose of waste properly. That includes dead batteries (LNT). Never put batteries in a fire, because Energizer warns they may leak or rupture (Energizer: Battery Care).

FAQ

Do I really need a headlamp for a short day hike?

Yes. NPS lists illumination as one of the Ten Essentials and recommends headlamps because they're hands-free (NPS). It also says a phone is not an appropriate light source (NPS).

How many lumens do I need in a headlamp for hiking?

There's no single number. Lumens measure total light output (Streamlight), and more brightness means less burn time for the same energy (Petzl). Compare run times at each setting. For hiking, Petzl suggests a mixed beam, which pairs ground lighting with some distance (Petzl).

Enjoy the short days

Short days aren't a reason to stop hiking. They're a reason to plan a little better. Check sunset, set your turnaround time, and carry a headlamp and spare batteries every time. Keep your light low and kind, stay on the trail, and give wildlife their dark.

To be transparent: I use AI to help gather comparison data and research for MOE articles. The experiences and opinions are my own.

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