How do you get found if you're lost outdoors? Stop moving, make yourself easy to find, and signal in ways searchers recognize: a call or text to 911 if you have any signal, a registered personal locator beacon if you don't, then three whistle blasts, a signal mirror, ground symbols and, at night, three fires in a triangle. Just as important is what you did before you left: a trip plan with someone who expects you back. This guide walks through each step and the sources behind it.
This article is general safety information. In an emergency, call 911.
Step 1: Stop Before You Make It Worse
The moment you realize you don't know where you are, stop walking. Sit down, drink some water, and think through where you last knew your position. Many outdoor programs teach this as S.T.O.P.: Stop, Think, Observe, Plan. Moving while panicked tends to take you farther from the trail and from the area searchers will check first.
For children, the Hug-A-Tree and Survive program teaches one simple rule: if you're lost, pick a tree and stay with it. A person who stays in one place is far easier to find than one who keeps moving, and staying put also prevents falls and injuries.
Step 2: Call or Text 911 If You Have Any Signal
If your phone shows any service, call 911. The FCC advises making a voice call whenever possible, because a voice call gives the 911 center more information. If you can't talk, try a text: text-to-911 isn't available everywhere, but where it isn't, carriers are required to send an automatic "bounce-back" message so you know to try another way (FCC: Text to 911).
Before you dial, have your location details ready: the trail name, the last junction or landmark you passed, and the direction you were heading. Then save your battery. Low-power mode and closing apps buy you time.
Step 3: No Service? A Personal Locator Beacon Works Without It
A personal locator beacon (PLB) transmits a distress signal on 406 MHz to the international Cospas-Sarsat search-and-rescue satellite system. It doesn't need a cell network. In the United States, NOAA runs the beacon registry, and its guidance is clear: registration is free and is required by federal regulations (NOAA SARSAT). Registration links your beacon's unique ID to your emergency contacts and details, which helps rescuers know who they're looking for.
Keep the beacon on your body, in a chest pocket or on a shoulder strap, rather than inside a pack you might lose or be unable to reach.
Step 4: Three Whistle Blasts (or Six in the Alps)
A whistle is the cheapest, lightest signal you can carry, and it outlasts your voice. Three blasts of a whistle is a widely recognized distress signal in the U.S., part of the old rule that three of anything (three blasts, three flashes, three fires) means help (Be Ready Utah, Utah Division of Emergency Management).
- Blow three short, sharp blasts. Short bursts read as a signal; one long blast doesn't.
- Stop and listen for an answer.
- Repeat at steady intervals until someone responds.
If you hike in the Alps or much of Europe, mountain rescuers use the International Mountain Distress Signal instead: six blasts (or flashes) in one minute, then one minute of silence, repeated. The reply is three signals a minute. Learn the local convention before you travel. Either pattern beats shouting.
Clip your whistle to a shoulder strap or jacket zipper, not inside the pack, and give every child in your group their own.
Step 5: Flash a Signal Mirror in Daylight
Reflected sunlight can be seen for miles, which makes a signal mirror one of the best daytime signals for aircraft and distant ground searchers. Be Ready Utah recommends aiming through a "V" made with two fingers and flashing in repeated sets of three, and warns never to flash aircraft unless you're actually in a survival situation. For a full walkthrough, see our guide to using a survival signal mirror.
Step 6: Spell It Out for Aircraft
The FAA's Aeronautical Information Manual publishes the Ground-Air Visual Code for use by survivors (FAA AIM, Chapter 6):
| Symbol | Meaning |
| V | Require assistance |
| X | Require medical assistance |
| N | No or negative |
| Y | Yes or affirmative |
| ↑ (arrow) | Proceeding in this direction |
The FAA's instructions: make symbols at least 10 feet high, with as much color contrast as possible against the background, using fabric, wood, stones or anything available. On snow, drag, shovel or tramp the symbols out; the depressed areas appear dark from the air. If in doubt, use the international symbol SOS.
Step 7: Three Fires at Night, Smoke by Day
At night, three fires arranged in a triangle can be seen from the air. Build them in a clearing or on a ridgeline, not under trees. During the day, adding green vegetation or damp leaves to a hot fire makes thick smoke (Be Ready Utah). Clear the ground around every fire, keep it contained, and follow any fire restrictions in effect. A signal fire that spreads becomes a second emergency.
Step 8: Leave a Trip Plan Every Time
The best signal is the one you send before you leave. The National Park Service recommends leaving a trip plan with a trusted contact who is not on the trip, including travel details, your expected return date and time, activity details and a backup plan (NPS: Trip Plan). Write down:
- Who's going, with a phone number for each person
- Your trailhead, route and destination, and the vehicle you're driving
- When you expect to be out
- Your backup route if conditions change
Give the plan to a person, not the park; the NPS notes parks won't accept trip plans. If you're overdue, your contact tries the number in your plan first, then contacts authorities and shares your plan. Let them know if you switch to your backup route, and check in when you're out. "The more details you provide the more help Search and Rescue authorities will have."
Frequently Asked Questions
Is three whistle blasts the universal distress signal?
Three of anything is widely recognized as a call for help in the U.S. and many other places. In the Alps and much of Europe, the International Mountain Distress Signal uses six signals a minute instead. Know the convention where you're traveling.
Do I have to register a personal locator beacon?
Yes. NOAA states that U.S.-coded 406 MHz beacons must be registered, and registration is free. You can register online at beaconregistration.noaa.gov.
What does an X on the ground mean to a pilot?
In the FAA's ground-air code, X means "require medical assistance." V means "require assistance." If you aren't sure, SOS is understood everywhere.
Should I keep walking to find help?
Usually no. Once you've signaled, stay in a visible spot. A person who stays in one place is easier to find than one who keeps moving.
Build Your Get-Found Kit
A whistle, a signal mirror, a headlamp, a charged power bank and a first aid kit weigh very little and cover most of the steps above. Browse our camping and survival gear, lights and first aid kits, and read Pillar 8: Navigation for the skills that keep you from getting lost in the first place.
